100
How can I programmatically change the column where incremental searching is performed

Tree1->Columns->Add(L"Column 1");
Tree1->Columns->Add(L"Column 2");
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->set_CellCaption(TVariant(var_Items->AddItem(TVariant("Item 1"))),TVariant(1),TVariant("SubItem 1"));
Tree1->SearchColumnIndex = 1;

99
How do I disable the full-row selection in the control

Tree1->FullRowSelect = false;
Tree1->Columns->Add(L"Column");
Tree1->Items->AddItem(TVariant("One"));
Tree1->Items->AddItem(TVariant("Two"));

98
Is there any option to specify the height of the items, before adding them

Tree1->DefaultItemHeight = 32;
Tree1->Columns->Add(L"Column");
Tree1->Items->AddItem(TVariant("One"));
Tree1->Items->AddItem(TVariant("Two"));

97
How do lock / fix some columns to the control, so I can see them all the time, event if I scroll the columns

Tree1->CountLockedColumns = 1;
Tree1->BackColorLock = RGB(240,240,240);
Tree1->ColumnAutoResize = false;
Tree1->Columns->Add(L"Locked")->Width = 128;
Tree1->Columns->Add(L"Un-Locked 1")->Width = 128;
Tree1->Columns->Add(L"Un-Locked 2")->Width = 128;
Tree1->Columns->Add(L"Un-Locked 3")->Width = 128;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->set_CellCaption(TVariant(var_Items->AddItem(TVariant("locked"))),TVariant(1),TVariant("unlocked"));

96
How do I change the control's background / foreground color on the locked area

Tree1->CountLockedColumns = 1;
Tree1->ForeColorLock = RGB(240,240,240);
Tree1->BackColorLock = RGB(128,128,128);
Tree1->ColumnAutoResize = false;
Tree1->Columns->Add(L"Locked")->Width = 128;
Tree1->Columns->Add(L"Un-Locked 1")->Width = 128;
Tree1->Columns->Add(L"Un-Locked 2")->Width = 128;
Tree1->Columns->Add(L"Un-Locked 3")->Width = 128;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->set_CellCaption(TVariant(var_Items->AddItem(TVariant("locked"))),TVariant(1),TVariant("unlocked"));

95
How do I change the control's foreground color

Tree1->ForeColor = RGB(120,120,120);
Tree1->Columns->Add(L"Column");
Tree1->Items->AddItem(TVariant("item"));

94
How do I change the control's background color

Tree1->BackColor = RGB(200,200,200);

93
How do I use my own icons for my radio buttons

Tree1->Images(TVariant(String("gBJJgBAIDAAGAAEAAQhYAf8Pf4hh0QihCJo2AEZjQAjEZFEaIEaEEaAIAkcbk0olUrlktl0vmExmUzmk1m03nE5nU7nk9n0/oFBoVDolFo1HpFJpVLplNp1PqFRqVTq") +
"lVq1XrFZrVbrldr1fsFhsVjslls1ntFptVrtltt1vuFxuVzul1u13vF5vV7vl9v1/wGBwWDwmFw2HxGJxWLxmNx0xiFdyOTh8Tf9ZymXx+QytcyNgz8r0OblWjyWds+m" +
"0ka1Vf1ta1+r1mos2xrG2xeZ0+a0W0qOx3GO4NV3WeyvD2XJ5XL5nN51aiw+lfSj0gkUkAEllHanHI5j/cHg8EZf7w8vl8j4f/qfEZeB09/vjLAB30+kZQAP/P5/H6/y" +
"NAOAEAwCjMBwFAEDwJBMDwLBYAP2/8Hv8/gAGAD8LQs9w/nhDY/oygIA="));
Tree1->RadioImage[false] = 1;
Tree1->RadioImage[true] = 2;
Tree1->Columns->Add(L"Radio")->set_Def(Extreelib_tlb::DefColumnEnum::exCellHasRadioButton,TVariant(true));
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->AddItem(TVariant("Radio 1"));
	var_Items->set_CellState(TVariant(var_Items->AddItem(TVariant("Radio 2"))),TVariant(0),1);
	var_Items->AddItem(TVariant("Radio 3"));

92
How do I use my own icons for checkbox cells

Tree1->Images(TVariant(String("gBJJgBAIDAAGAAEAAQhYAf8Pf4hh0QihCJo2AEZjQAjEZFEaIEaEEaAIAkcbk0olUrlktl0vmExmUzmk1m03nE5nU7nk9n0/oFBoVDolFo1HpFJpVLplNp1PqFRqVTq") +
"lVq1XrFZrVbrldr1fsFhsVjslls1ntFptVrtltt1vuFxuVzul1u13vF5vV7vl9v1/wGBwWDwmFw2HxGJxWLxmNx0xiFdyOTh8Tf9ZymXx+QytcyNgz8r0OblWjyWds+m" +
"0ka1Vf1ta1+r1mos2xrG2xeZ0+a0W0qOx3GO4NV3WeyvD2XJ5XL5nN51aiw+lfSj0gkUkAEllHanHI5j/cHg8EZf7w8vl8j4f/qfEZeB09/vjLAB30+kZQAP/P5/H6/y" +
"NAOAEAwCjMBwFAEDwJBMDwLBYAP2/8Hv8/gAGAD8LQs9w/nhDY/oygIA="));
Tree1->CheckImage[Extreelib_tlb::CheckStateEnum::Unchecked] = 1;
Tree1->CheckImage[Extreelib_tlb::CheckStateEnum::Checked] = 2;
Tree1->Columns->Add(L"Check")->set_Def(Extreelib_tlb::DefColumnEnum::exCellHasCheckBox,TVariant(true));
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->AddItem(TVariant("Check 1"));
	var_Items->set_CellState(TVariant(var_Items->AddItem(TVariant("Check 2"))),TVariant(0),1);

91
How do I perform my own sorting when user clicks the column's header

Tree1->SortOnClick = Extreelib_tlb::SortOnClickEnum::exUserSort;
Tree1->Columns->Add(L"Column");
Tree1->Items->AddItem(TVariant("Item 1"));
Tree1->Items->AddItem(TVariant("Item 2"));

90
How do I disable sorting a specified column when clicking its header
Tree1->Columns->Add(L"1");
Tree1->Columns->Add(L"NoSort")->AllowSort = false;

89
How do I disable sorting the columns when clicking the control's header
Tree1->SortOnClick = Extreelib_tlb::SortOnClickEnum::exNoSort;
Tree1->Columns->Add(L"1");
Tree1->Columns->Add(L"2");

88
How do I put a picture on the center of the control

Tree1->Picture = (IPictureDisp*)(Tree1->ExecuteTemplate("loadpicture(`c:\\exontrol\\images\\zipdisk.gif`)"));
Tree1->PictureDisplay = Extreelib_tlb::PictureDisplayEnum::MiddleCenter;

87
How do I resize/stretch a picture on the control's background

Tree1->Picture = (IPictureDisp*)(Tree1->ExecuteTemplate("loadpicture(`c:\\exontrol\\images\\zipdisk.gif`)"));
Tree1->PictureDisplay = Extreelib_tlb::PictureDisplayEnum::Stretch;

86
How do I put a picture on the control's center right bottom side

Tree1->Picture = (IPictureDisp*)(Tree1->ExecuteTemplate("loadpicture(`c:\\exontrol\\images\\zipdisk.gif`)"));
Tree1->PictureDisplay = Extreelib_tlb::PictureDisplayEnum::LowerRight;

85
How do I put a picture on the control's center left bottom side

Tree1->Picture = (IPictureDisp*)(Tree1->ExecuteTemplate("loadpicture(`c:\\exontrol\\images\\zipdisk.gif`)"));
Tree1->PictureDisplay = Extreelib_tlb::PictureDisplayEnum::LowerLeft;

84
How do I put a picture on the control's center top side

Tree1->Picture = (IPictureDisp*)(Tree1->ExecuteTemplate("loadpicture(`c:\\exontrol\\images\\zipdisk.gif`)"));
Tree1->PictureDisplay = Extreelib_tlb::PictureDisplayEnum::UpperCenter;

83
How do I put a picture on the control's right top corner

Tree1->Picture = (IPictureDisp*)(Tree1->ExecuteTemplate("loadpicture(`c:\\exontrol\\images\\zipdisk.gif`)"));
Tree1->PictureDisplay = Extreelib_tlb::PictureDisplayEnum::UpperRight;

82
How do I put a picture on the control's left top corner

Tree1->Picture = (IPictureDisp*)(Tree1->ExecuteTemplate("loadpicture(`c:\\exontrol\\images\\zipdisk.gif`)"));
Tree1->PictureDisplay = Extreelib_tlb::PictureDisplayEnum::UpperLeft;

81
How do I put a picture on the control's background

Tree1->Picture = (IPictureDisp*)(Tree1->ExecuteTemplate("loadpicture(`c:\\exontrol\\images\\zipdisk.gif`)"));

80
How do I sort descending a column, and put the sorting icon in the column's header

Tree1->Columns->Add(L"Column");
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->AddItem(TVariant("Item 1"));
	var_Items->AddItem(TVariant("Item 2"));
	var_Items->AddItem(TVariant("Item 3"));
Tree1->Columns->get_Item(TVariant(0))->SortOrder = Extreelib_tlb::SortOrderEnum::SortDescending;

79
How do I sort ascending a column, and put the sorting icon in the column's header

Tree1->Columns->Add(L"Column");
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->AddItem(TVariant("Item 3"));
	var_Items->AddItem(TVariant("Item 1"));
	var_Items->AddItem(TVariant("Item 2"));
Tree1->Columns->get_Item(TVariant(0))->SortOrder = Extreelib_tlb::SortOrderEnum::SortAscending;

78
How do I perform my own/custom sort, using my extra strings

Tree1->Columns->Add(L"desc")->SortType = Extreelib_tlb::SortTypeEnum::SortUserData;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->set_CellData(TVariant(var_Items->AddItem(TVariant("A"))),TVariant(0),TVariant("C"));
	var_Items->set_CellData(TVariant(var_Items->AddItem(TVariant("B"))),TVariant(0),TVariant("B"));
	var_Items->set_CellData(TVariant(var_Items->AddItem(TVariant("C"))),TVariant(0),TVariant("A"));
	var_Items->SortChildren(0,TVariant(0),false);

77
How do I perform my own/custom sort, using my extra numbers

Tree1->Columns->Add(L"desc")->SortType = Extreelib_tlb::SortTypeEnum::SortUserData;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->set_CellData(TVariant(var_Items->AddItem(TVariant(0))),TVariant(0),TVariant(2));
	var_Items->set_CellData(TVariant(var_Items->AddItem(TVariant(1))),TVariant(0),TVariant(1));
	var_Items->set_CellData(TVariant(var_Items->AddItem(TVariant(2))),TVariant(0),TVariant(0));
	var_Items->SortChildren(0,TVariant(0),false);

76
By default, the column gets sorted as strings, so how do I sort a column by time only

Tree1->Columns->Add(L"desc")->SortType = Extreelib_tlb::SortTypeEnum::SortTime;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->AddItem(TVariant("11:00"));
	var_Items->AddItem(TVariant("10:10"));
	var_Items->AddItem(TVariant("12:12"));
	var_Items->SortChildren(0,TVariant(0),false);

75
By default, the column gets sorted as strings, so how do I sort a column by date and time

Tree1->Columns->Add(L"desc")->SortType = Extreelib_tlb::SortTypeEnum::SortDateTime;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->AddItem(TVariant("1/1/2001 11:00"));
	var_Items->AddItem(TVariant("1/1/2001 10:10"));
	var_Items->AddItem(TVariant("1/3/2003"));
	var_Items->SortChildren(0,TVariant(0),false);

74
By default, the column gets sorted as strings, so how do I sort a column by dates

Tree1->Columns->Add(L"desc")->SortType = Extreelib_tlb::SortTypeEnum::SortDate;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->AddItem(TVariant("1/1/2001"));
	var_Items->AddItem(TVariant("1/2/2002"));
	var_Items->AddItem(TVariant("1/3/2003"));
	var_Items->SortChildren(0,TVariant(0),false);

73
How do I sort a column by numbers

Tree1->Columns->Add(L"desc")->SortType = Extreelib_tlb::SortTypeEnum::SortNumeric;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->AddItem(TVariant(1));
	var_Items->AddItem(TVariant(5));
	var_Items->AddItem(TVariant(10));
	var_Items->SortChildren(0,TVariant(0),false);

72
How do I hide the control's header bar

Tree1->HeaderVisible = false;

71
How do change the visual appearance for the control's header bar, using EBN

Tree1->VisualAppearance->Add(1,TVariant("c:\\exontrol\\images\\normal.ebn"));
Tree1->BackColorHeader = 0x1000000;

70
How do I remove the control's border
Tree1->Appearance = Extreelib_tlb::AppearanceEnum::None2;

69
I have a hierarchy and I need to filter only root items that match, with thier childs

Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exLinesAtRoot;
Tree1->FilterInclude = Extreelib_tlb::FilterIncludeEnum::exRootsWithChilds;
Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exFilter;
	var_Column->Filter = L"R1";
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("R1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C2"));
	var_Items->set_ExpandItem(h,true);
	h = var_Items->AddItem(TVariant("R2"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C2"));
Tree1->ApplyFilter();

68
I have a hierarchy and I need to filter only root items that match, without thier childs

Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exLinesAtRoot;
Tree1->FilterInclude = Extreelib_tlb::FilterIncludeEnum::exRootsWithoutChilds;
Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exFilter;
	var_Column->Filter = L"R1";
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("R1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C2"));
	var_Items->set_ExpandItem(h,true);
	h = var_Items->AddItem(TVariant("R2"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C2"));
Tree1->ApplyFilter();

67
I have a hierarchy and I need to filter only parent items that match, including thier childs

Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exLinesAtRoot;
Tree1->FilterInclude = Extreelib_tlb::FilterIncludeEnum::exItemsWithChilds;
Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exFilter;
	var_Column->Filter = L"R1";
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("R1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C2"));
	var_Items->set_ExpandItem(h,true);
	h = var_Items->AddItem(TVariant("R2"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("C2"));
Tree1->ApplyFilter();

66
How can I get ride/hide of the "Filter For" field

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->DisplayFilterPattern = false;

65
Is there any way to get listed only visible items in the drop down filter window

Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exLinesAtRoot;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarAll] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarBlanks] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarNonBlanks] = L"";
Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"P1");
	var_Column->DisplayFilterButton = true;
	var_Column->DisplayFilterPattern = false;
	var_Column->FilterList = Extreelib_tlb::FilterListEnum::exVisibleItems;
Extreelib_tlb::IColumnPtr var_Column1 = Tree1->Columns->Add(L"P2");
	var_Column1->DisplayFilterButton = true;
	var_Column1->DisplayFilterPattern = false;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("R1"));
	var_Items->set_CellCaption(TVariant(h),TVariant(1),TVariant("R2"));
	var_Items->set_CellCaption(TVariant(var_Items->InsertItem(h,TNoParam(),TVariant("Cell 1.1"))),TVariant(1),TVariant("Cell 1.2"));
	var_Items->set_CellCaption(TVariant(var_Items->InsertItem(h,TNoParam(),TVariant("Cell 2.1"))),TVariant(1),TVariant("Cell 2.2"));

64
How do I filter for items that match exactly the specified string

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exFilter;
	var_Column->Filter = L"Item 1";
Tree1->Items->AddItem(TVariant("Item 1"));
Tree1->Items->AddItem(TVariant("Item 2"));
Tree1->Items->AddItem(TVariant("Item 3"));
Tree1->ApplyFilter();

63
How can I can I programmatically filter for items with a specified icon assigned

Tree1->Images(TVariant(String("gBJJgBAIDAAGAAEAAQhYAf8Pf4hh0QihCJo2AEZjQAjEZFEaIEaEEaAIAkcbk0olUrlktl0vmExmUzmk1m03nE5nU7nk9n0/oFBoVDolFo1HpFJpVLplNp1PqFRqVTq") +
"lVq1XrFZrVbrldr1fsFhsVjslls1ntFptVrtltt1vuFxuVzul1u13vF5vV7vl9v1/wGBwWDwmFw2HxGJxWLxmNx0xiFdyOTh8Tf9ZymXx+QytcyNgz8r0OblWjyWds+m" +
"0ka1Vf1ta1+r1mos2xrG2xeZ0+a0W0qOx3GO4NV3WeyvD2XJ5XL5nN51aiw+lfSj0gkUkAEllHanHI5j/cHg8EZf7w8vl8j4f/qfEZeB09/vjLAB30+kZQAP/P5/H6/y" +
"NAOAEAwCjMBwFAEDwJBMDwLBYAP2/8Hv8/gAGAD8LQs9w/nhDY/oygIA="));
Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exImage;
	var_Column->Filter = L"1";
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->set_CellImage(TVariant(var_Items->AddItem(TVariant("Image 1"))),TVariant(0),1);
	var_Items->set_CellImage(TVariant(var_Items->AddItem(TVariant("Image 1"))),TVariant(0),1);
	var_Items->set_CellImage(TVariant(var_Items->AddItem(TVariant("Image 2"))),TVariant(0),2);
	var_Items->set_CellImage(TVariant(var_Items->AddItem(TVariant("Image 3"))),TVariant(0),3);
Tree1->ApplyFilter();

62
How can I can I programmatically filter the checked items

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->set_Def(Extreelib_tlb::DefColumnEnum::exCellHasCheckBox,TVariant(true));
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exCheck;
	var_Column->Filter = L"0";
Tree1->Items->AddItem(TVariant(0));
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->set_CellState(TVariant(var_Items->AddItem(TVariant(1))),TVariant(0),1);
Tree1->Items->AddItem(TVariant(2));
Tree1->ApplyFilter();

61
How can I can I filter programmatically the items based on some numerichal rules

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exNumeric;
	var_Column->Filter = L"> 0 <= 1";
Tree1->Items->AddItem(TVariant(0));
Tree1->Items->AddItem(TVariant(1));
Tree1->Items->AddItem(TVariant(2));
Tree1->ApplyFilter();

60
How can I can I filter programmatically the items based on a range/interval of dates

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->DisplayFilterDate = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exDate;
	var_Column->Filter = L"1/1/2001 to 1/1/2002";
Tree1->Items->AddItem(TVariant("1/1/2001"));
Tree1->Items->AddItem(TVariant("2/1/2002"));
Tree1->ApplyFilter();

59
How can I can I filter programmatically given a specified pattern using wild characters like * or

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exPattern;
	var_Column->Filter = L"0*";
Tree1->Items->AddItem(TVariant(0));
Tree1->Items->AddItem(TVariant("00"));
Tree1->Items->AddItem(TVariant(1));
Tree1->Items->AddItem(TVariant("11"));
Tree1->ApplyFilter();

58
How can I can I select programmatically "Blanks/NonBlanks" option in the column's drop down filter

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exBlanks;
Tree1->ApplyFilter();

57
How can I display the column's filter

Tree1->Columns->Add(L"")->DisplayFilterButton = true;

56
How can I show only the vertical scroll bar

Tree1->ColumnAutoResize = true;
Tree1->ScrollBars = Extreelib_tlb::ScrollBarsEnum::exDisableNoVertical;
Tree1->Columns->Add(L"1");
Tree1->Columns->Add(L"2");

55
How can I show the control's grid lines only for added/visible items

Tree1->MarkSearchColumn = false;
Tree1->DrawGridLines = Extreelib_tlb::GridLinesEnum::exRowLines;
Tree1->Columns->Add(L"Column 1");
Tree1->Columns->Add(L"Column 2");
Tree1->Items->AddItem(TVariant(0));
Tree1->Items->AddItem(TVariant(1));
Tree1->Items->AddItem(TVariant(2));

54
Can I hide the hierarchy lines

Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exGroupLinesAtRoot;
Tree1->HasLines = Extreelib_tlb::HierarchyLineEnum::exNoLine;
Tree1->Columns->Add(L"Column");
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("Root 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 2"));
	var_Items->set_ExpandItem(h,true);
	h = var_Items->AddItem(TVariant("Root 2"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child"));

53
Can I change the style or type for the hierarchy lines

Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exGroupLinesAtRoot;
Tree1->HasLines = Extreelib_tlb::HierarchyLineEnum::exThinLine;
Tree1->Columns->Add(L"Column");
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("Root 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 2"));
	var_Items->set_ExpandItem(h,true);
	h = var_Items->AddItem(TVariant("Root 2"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child"));

52
Can I use my own icons for the +/- ( expand/collapse ) buttons

Tree1->Images(TVariant(String("gBJJgBAIDAAGAAEAAQhYAf8Pf4hh0QihCJo2AEZjQAjEZFEaIEaEEaAIAkcbk0olUrlktl0vmExmUzmk1m03nE5nU7nk9n0/oFBoVDolFo1HpFJpVLplNp1PqFRqVTq") +
"lVq1XrFZrVbrldr1fsFhsVjslls1ntFptVrtltt1vuFxuVzul1u13vF5vV7vl9v1/wGBwWDwmFw2HxGJxWLxmNx0xiFdyOTh8Tf9ZymXx+QytcyNgz8r0OblWjyWds+m" +
"0ka1Vf1ta1+r1mos2xrG2xeZ0+a0W0qOx3GO4NV3WeyvD2XJ5XL5nN51aiw+lfSj0gkUkAEllHanHI5j/cHg8EZf7w8vl8j4f/qfEZeB09/vjLAB30+kZQAP/P5/H6/y" +
"NAOAEAwCjMBwFAEDwJBMDwLBYAP2/8Hv8/gAGAD8LQs9w/nhDY/oygIA="));
Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exGroupLinesAtRoot;
Tree1->HasButtons = Extreelib_tlb::ExpandButtonEnum::exCustom;
Tree1->HasButtonsCustom[false] = 1;
Tree1->HasButtonsCustom[true] = 2;
Tree1->Columns->Add(L"Column");
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("Root 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 2"));
	var_Items->set_ExpandItem(h,true);
	h = var_Items->AddItem(TVariant("Root 2"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child"));

51
How do I change visual appearance of the +/- ( expand/collapse ) buttons

Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exGroupLinesAtRoot;
Tree1->HasButtons = Extreelib_tlb::ExpandButtonEnum::exWPlus;
Tree1->Columns->Add(L"Column");
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("Root 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 2"));
	var_Items->set_ExpandItem(h,true);
	h = var_Items->AddItem(TVariant("Root 2"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child"));

50
How can I change the "IsChecked/IsUnchecked" caption in the control's filter bar, when I filter for checked items

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exCheck;
	var_Column->Filter = L"0";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarIsChecked] = L"Check_On";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarIsUnchecked] = L"Check_Off";
Tree1->ApplyFilter();

49
How can I change the "Checked" caption in the drop down filter window, when I filter for checked items

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exCheck;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarChecked] = L"with check on";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarUnchecked] = L"with check off";

48
How can I change the name of the week days in the drop down calendar window, being displayed when I filter items between dates

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->DisplayFilterDate = true;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarDateWeekDays] = L"Du Lu Ma Mi Jo Vi Si";
Tree1->ApplyFilter();

47
How can I change the name of the months in the drop down calendar window, being displayed when I filter items between dates

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->DisplayFilterDate = true;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarDateMonths] = L"Janvier Février Mars Avril Mai Juin Juillet Août Septembre Octobre Novembre Décembre";
Tree1->ApplyFilter();

46
Can I change the "Today" caption being displayed in the drop down calendar, when I filter for dates

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->DisplayFilterDate = true;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarDateTodayCaption] = L"Azi";
Tree1->ApplyFilter();

45
The drop down filter window displays a "to" string between two datem when I filter dates. Can I change that

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->DisplayFilterDate = true;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarDateTo] = L"->";
Tree1->ApplyFilter();

44
How can I filter the items that are between an interval/range of dates

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->DisplayFilterDate = true;
Tree1->ApplyFilter();

43
Can I change the "Date:" caption when the column's drop down filter window is shown

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->DisplayFilterDate = true;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarDate] = L"Range";
Tree1->ApplyFilter();

42
Can I filter for values using OR - NOT , instead AND operator

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column 1");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exBlanks;
Extreelib_tlb::IColumnPtr var_Column1 = Tree1->Columns->Add(L"Column 2");
	var_Column1->DisplayFilterButton = true;
	var_Column1->FilterType = Extreelib_tlb::FilterTypeEnum::exBlanks;
Extreelib_tlb::IColumnPtr var_Column2 = Tree1->Columns->Add(L"Column 3");
	var_Column2->DisplayFilterButton = true;
	var_Column2->FilterType = Extreelib_tlb::FilterTypeEnum::exBlanks;
Tree1->FilterCriteria = L"%0 or not %1 and %2";
Tree1->ApplyFilter();

41
Can I change the NOT string in the filter bar

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column 1");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exBlanks;
Extreelib_tlb::IColumnPtr var_Column1 = Tree1->Columns->Add(L"Column 2");
	var_Column1->DisplayFilterButton = true;
	var_Column1->FilterType = Extreelib_tlb::FilterTypeEnum::exNonBlanks;
Tree1->FilterCriteria = L"not %0 or %1";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarNot] = L" ! ";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarIsNonBlank] = L" ! IsBlank";
Tree1->ApplyFilter();

40
Can I change the OR string in the filter bar

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column 1");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exBlanks;
Extreelib_tlb::IColumnPtr var_Column1 = Tree1->Columns->Add(L"Column 2");
	var_Column1->DisplayFilterButton = true;
	var_Column1->FilterType = Extreelib_tlb::FilterTypeEnum::exNonBlanks;
Tree1->FilterCriteria = L"%0 or %1";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarOr] = L" | ";
Tree1->ApplyFilter();

39
Can I change the AND string in the filter bar

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column 1");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exBlanks;
Extreelib_tlb::IColumnPtr var_Column1 = Tree1->Columns->Add(L"Column 2");
	var_Column1->DisplayFilterButton = true;
	var_Column1->FilterType = Extreelib_tlb::FilterTypeEnum::exNonBlanks;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarAnd] = L" & ";
Tree1->ApplyFilter();

38
The "IsBlank" caption shown in the control's filterbar when I select "Blanks" or "NonBlanks" items in the column's drop down filter window

Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Column");
	var_Column->DisplayFilterButton = true;
	var_Column->FilterType = Extreelib_tlb::FilterTypeEnum::exBlanks;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarIsBlank] = L"Is Empty";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarIsNonBlank] = L"Is Not Empty";
Tree1->ApplyFilter();

37
Is there any option to remove the tooltip when the cursor hovers the column's drop down filter window
Tree1->Columns->Add(L"Column")->DisplayFilterButton = true;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarFilterTitle] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarPatternFilterTitle] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarTooltip] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarPatternTooltip] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarFilterForTooltip] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarDateTooltip] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarDateTitle] = L"";

36
How can I change the "Filter For" caption in the column's drop down filter window

Tree1->Columns->Add(L"Column")->DisplayFilterButton = true;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarFilterForCaption] = L"new caption";

35
Can I remove the "All", "Blanks" and "NonBlanks" items in the drop down filter window

Tree1->Columns->Add(L"Column")->DisplayFilterButton = true;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarAll] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarBlanks] = L"";
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarNonBlanks] = L"";

34
How do I change the "All", "Blanks" or/and "NonBlanks" caption in the drop down filter window

Tree1->Columns->Add(L"Column")->DisplayFilterButton = true;
Tree1->Description[Extreelib_tlb::DescriptionTypeEnum::exFilterBarAll] = L"new name for (All)";

33
How can I change the position of the column

Tree1->Columns->Add(L"Column 1");
Tree1->Columns->Add(L"Column 2")->Position = 0;

32
Can I make strikeout the column's header

Tree1->Columns->Add(L"Column 1")->HeaderStrikeOut = true;

31
How can I apply an strikeout font only a portion of the column's header

Tree1->Columns->Add(L"Column 1")->HTMLCaption = L"<s>Col</s>umn 1";

30
How can I get underlined only a portion of column's header

Tree1->Columns->Add(L"Column 1")->HTMLCaption = L"<u>Col</u>umn 1";

29
How can I underline the column's header

Tree1->Columns->Add(L"Column 1")->HeaderUnderline = true;

28
How can I apply an italic font only a portion of the column's header

Tree1->Columns->Add(L"Column 1")->HTMLCaption = L"<i>Col</i>umn 1";

27
Is there any option to make italic the column's header

Tree1->Columns->Add(L"Column 1")->HeaderItalic = true;

26
How can I bold only a portion of the column's header

Tree1->Columns->Add(L"Column 1")->HTMLCaption = L"<b>Col</b>umn 1";

25
Is there any option to bold the column's header

Tree1->Columns->Add(L"Column 1")->HeaderBold = true;

24
Why child items are not shown

Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exLinesAtRoot;
Tree1->Columns->Add(L"Column 1");
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("Root"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 2"));
	var_Items->set_ExpandItem(h,true);

23
Does your control support partial-check ( three states ) feature for each column

Tree1->LinesAtRoot = Extreelib_tlb::LinesAtRootEnum::exLinesAtRoot;
Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"P1");
	var_Column->set_Def(Extreelib_tlb::DefColumnEnum::exCellHasCheckBox,TVariant(true));
	var_Column->PartialCheck = true;
Extreelib_tlb::IColumnPtr var_Column1 = Tree1->Columns->Add(L"P2");
	var_Column1->set_Def(Extreelib_tlb::DefColumnEnum::exCellHasCheckBox,TVariant(true));
	var_Column1->PartialCheck = true;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	long h = var_Items->AddItem(TVariant("Root"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 1"));
	var_Items->InsertItem(h,TNoParam(),TVariant("Child 2"));
	var_Items->set_ExpandItem(h,true);

22
Is there any option to change the color for the grid lines

Tree1->Columns->Add(L"");
Tree1->DrawGridLines = Extreelib_tlb::GridLinesEnum::exAllLines;
Tree1->GridLineColor = RGB(255,0,0);

21
Can I change the font to display the column's header

Tree1->HeaderHeight = 34;
Tree1->Columns->Add(L"Column 1")->HTMLCaption = L"<font Tahoma;14>Column</font> 1";

20
Can I change the height of the header bar

Tree1->HeaderHeight = 32;

19
Can I display multiple icons to the column's header

Tree1->Images(TVariant(String("gBJJgBAIDAAGAAEAAQhYAf8Pf4hh0QihCJo2AEZjQAjEZFEaIEaEEaAIAkcbk0olUrlktl0vmExmUzmk1m03nE5nU7nk9n0/oFBoVDolFo1HpFJpVLplNp1PqFRqVTq") +
"lVq1XrFZrVbrldr1fsFhsVjslls1ntFptVrtltt1vuFxuVzul1u13vF5vV7vl9v1/wGBwWDwmFw2HxGJxWLxmNx0xiFdyOTh8Tf9ZymXx+QytcyNgz8r0OblWjyWds+m" +
"0ka1Vf1ta1+r1mos2xrG2xeZ0+a0W0qOx3GO4NV3WeyvD2XJ5XL5nN51aiw+lfSj0gkUkAEllHanHI5j/cHg8EZf7w8vl8j4f/qfEZeB09/vjLAB30+kZQAP/P5/H6/y" +
"NAOAEAwCjMBwFAEDwJBMDwLBYAP2/8Hv8/gAGAD8LQs9w/nhDY/oygIA="));
Tree1->Columns->Add(L"Column 1")->HTMLCaption = L"1<img>1</img> 2 <img>2</img>...";

18
How can I draw grid lines only for visible items

Tree1->MarkSearchColumn = false;
Tree1->DrawGridLines = Extreelib_tlb::GridLinesEnum::exRowLines;
Tree1->Columns->Add(L"Column 1");
Tree1->Columns->Add(L"Column 2");
Tree1->Items->AddItem(TVariant(0));
Tree1->Items->AddItem(TVariant(1));
Tree1->Items->AddItem(TVariant(2));

17
How can I show the control's grid lines

Tree1->MarkSearchColumn = false;
Tree1->DrawGridLines = Extreelib_tlb::GridLinesEnum::exAllLines;
Tree1->Columns->Add(L"Column 1");
Tree1->Columns->Add(L"Column 2");
Tree1->Items->AddItem(TVariant(0));
Tree1->Items->AddItem(TVariant(1));
Tree1->Items->AddItem(TVariant(2));

16
How can I assign a different background color for the entire column

Tree1->MarkSearchColumn = false;
Tree1->Columns->Add(L"Column 1")->set_Def(Extreelib_tlb::DefColumnEnum::exCellBackColor,TVariant(255));
Tree1->Columns->Add(L"Column 2");
Tree1->Items->AddItem(TVariant(0));
Tree1->Items->AddItem(TVariant(1));
Tree1->Items->AddItem(TVariant(2));

15
How can I assign a check box for a cell

Tree1->Columns->Add(L"Column 1");
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->AddItem(TVariant(0));
	var_Items->set_CellHasCheckBox(TVariant(var_Items->AddItem(TVariant(1))),TVariant(0),true);
	var_Items->AddItem(TVariant(2));

14
How can I assign checkboxes for the entire column

Tree1->Columns->Add(L"Column 1")->set_Def(Extreelib_tlb::DefColumnEnum::exCellHasCheckBox,TVariant(true));
Tree1->Items->AddItem(TVariant(0));
Tree1->Items->AddItem(TVariant(1));
Tree1->Items->AddItem(TVariant(2));

13
How can I show both scrollbars
Tree1->ScrollBars = Extreelib_tlb::ScrollBarsEnum::exDisableBoth;

12
How can I change the column's width

Tree1->ColumnAutoResize = false;
Tree1->Columns->Add(L"Column 1")->Width = 64;
Tree1->Columns->Add(L"Column 2")->Width = 128;

11
How can I show or hide a column
Tree1->Columns->Add(L"Hidden")->Visible = false;

10
How can I hide the searching column
Tree1->MarkSearchColumn = false;
Tree1->Columns->Add(L"Column 1");
Tree1->Columns->Add(L"Column 2");
Tree1->Items->AddItem(TNoParam());

9
Can I disable sorting a column, when the user clicks the column's header, or drag it to the sort bar
Tree1->Columns->Add(L"Unsortable")->AllowSort = false;
Tree1->Columns->Add(L"Sortable");

8
Is there any option to align the header to the left and the data to the right

Tree1->Columns->Add(L"Left")->Alignment = Extreelib_tlb::AlignmentEnum::LeftAlignment;
Extreelib_tlb::IColumnPtr var_Column = Tree1->Columns->Add(L"Right");
	var_Column->Alignment = Extreelib_tlb::AlignmentEnum::RightAlignment;
	var_Column->HeaderAlignment = Extreelib_tlb::AlignmentEnum::RightAlignment;
Extreelib_tlb::IItemsPtr var_Items = Tree1->Items;
	var_Items->set_CellCaption(TVariant(var_Items->AddItem(TVariant("left"))),TVariant(1),TVariant("right"));

7
Can I displays a custom size picture to column's header

Tree1->HTMLPicture[L"pic1"] = TVariant("c:\\exontrol\\images\\zipdisk.gif");
Tree1->HeaderHeight = 48;
Tree1->Columns->Add(L"ColumnName")->HTMLCaption = L"<b>HTML</b> Column <img>pic1</img> Picture";

6
How can I insert an icon to column's header

Tree1->Images(TVariant(String("gBJJgBAIDAAGAAEAAQhYAf8Pf4hh0QihCJo2AEZjQAjEZFEaIEaEEaAIAkcbk0olUrlktl0vmExmUzmk1m03nE5nU7nk9n0/oFBoVDolFo1HpFJpVLplNp1PqFRqVTq") +
"lVq1XrFZrVbrldr1fsFhsVjslls1ntFptVrtltt1vuFxuVzul1u13vF5vV7vl9v1/wGBwWDwmFw2HxGJxWLxmNx0xiFdyOTh8Tf9ZymXx+QytcyNgz8r0OblWjyWds+m" +
"0ka1Vf1ta1+r1mos2xrG2xeZ0+a0W0qOx3GO4NV3WeyvD2XJ5XL5nN51aiw+lfSj0gkUkAEllHanHI5j/cHg8EZf7w8vl8j4f/qfEZeB09/vjLAB30+kZQAP/P5/H6/y" +
"NAOAEAwCjMBwFAEDwJBMDwLBYAP2/8Hv8/gAGAD8LQs9w/nhDY/oygIA="));
Tree1->Columns->Add(L"ColumnName")->HTMLCaption = L"<b>HTML</b> Column <img>1</img> Icon";

5
How can I insert an icon to column's header

Tree1->Images(TVariant(String("gBJJgBAIDAAGAAEAAQhYAf8Pf4hh0QihCJo2AEZjQAjEZFEaIEaEEaAIAkcbk0olUrlktl0vmExmUzmk1m03nE5nU7nk9n0/oFBoVDolFo1HpFJpVLplNp1PqFRqVTq") +
"lVq1XrFZrVbrldr1fsFhsVjslls1ntFptVrtltt1vuFxuVzul1u13vF5vV7vl9v1/wGBwWDwmFw2HxGJxWLxmNx0xiFdyOTh8Tf9ZymXx+QytcyNgz8r0OblWjyWds+m" +
"0ka1Vf1ta1+r1mos2xrG2xeZ0+a0W0qOx3GO4NV3WeyvD2XJ5XL5nN51aiw+lfSj0gkUkAEllHanHI5j/cHg8EZf7w8vl8j4f/qfEZeB09/vjLAB30+kZQAP/P5/H6/y" +
"NAOAEAwCjMBwFAEDwJBMDwLBYAP2/8Hv8/gAGAD8LQs9w/nhDY/oygIA="));
Tree1->Columns->Add(L"ColumnName")->HeaderImage = 1;

4
How can I use HTML format in column's header

Tree1->Columns->Add(L"ColumnName")->HTMLCaption = L"<b>HTML</b> <fgcolor=0000FF>Col</fgcolor>umn";

3
How can I change/rename the column's name

Tree1->Columns->Add(L"ColumnName")->Caption = L"NewName";

2
How can I add multiple columns

Extreelib_tlb::IColumnsPtr var_Columns = Tree1->Columns;
	var_Columns->Add(L"Column 1");
	var_Columns->Add(L"Column 2");

1
How can I add a new column

Tree1->Columns->Add(L"ColumnName");