By default the ShowLinksWidth property is 0, which means that it has no effect. The ShowLinksWidth property specifies the width to show the links when the link starts from selected bar, ends on selected bar, or when it is not related to any of selected bars. The ShowLinksStyle property specifies the width to show the links when the link starts from selected bar, ends on selected bar, or when it is not related to any of selected bars. The ShowLinksColor property specifies the color to display the links when link starts from selected bar, ends on selected bar, or when it is not related to any of selected bars.  You can hide the links if the ShowLinksColor property is the same as the chart's background color being specified by the BackColor property.  

The ShowLinks property specifies whether the chart's links are visible or hidden. Use the LinkColor property to specify the color for all links in the chart area. Use the LinkStyle property to specify the style for all links in the chart area. Use the LinkWidth property to specify the width of the pen, in pixels, to draw the links between bars. Use the AddLink method to add programmatically a link a bar with another.

The following screen shows the links when no bar is selected:

The following screen shows the links when the bar 2 is selected:

The following VB sample makes the links that starts from selected bar being wider, while the rest being transparent:

With G2antt1
	.BeginUpdate 
	.Columns.Add "Tasks"
	With .Chart
		.FirstVisibleDate = #9/20/2006#
		.PaneWidth(0) = 64
		.ShowLinksWidth(exShowLinksStartFrom) = 2
		.ShowLinksStyle(exShowLinksStartFrom) = exLinkDot
		.ShowLinksColor(exShowLinksEndTo) = RGB(200,200,200)
		.ShowLinksColor(exShowUnselectedLinks) = RGB(200,200,200)
	End With
	With .Items
		h1 = .AddItem("Task 1")
		.AddBar h1,"Task",#9/21/2006#,#9/23/2006#
		h2 = .AddItem("Task 2")
		.AddBar h2,"Task",#9/25/2006#,#9/27/2006#
		.ItemBar(h2,"",exBarSelected) = True
		.AddLink "L1",h1,"",h2,""
		.Link("L1",exLinkText) = "L1"
		h3 = .AddItem("Task 3")
		.AddBar h3,"Task",#9/29/2006#,#10/2/2006#
		.AddLink "L2",h2,"",h3,""
		.Link("L2",exLinkText) = "L2"
	End With
	.EndUpdate 
End With

The following VB.NET sample makes the links that starts from selected bar being wider, while the rest being transparent:

Dim h1,h2,h3
With AxG2antt1
	.BeginUpdate 
	.Columns.Add "Tasks"
	With .Chart
		.FirstVisibleDate = #9/20/2006#
		.PaneWidth(0) = 64
		.ShowLinksWidth(EXG2ANTTLib.ShowLinksEnum.exShowLinksStartFrom) = 2
		.ShowLinksStyle(EXG2ANTTLib.ShowLinksEnum.exShowLinksStartFrom) = EXG2ANTTLib.LinkStyleEnum.exLinkDot
		.ShowLinksColor(EXG2ANTTLib.ShowLinksEnum.exShowLinksEndTo) = 13158600
		.ShowLinksColor(EXG2ANTTLib.ShowLinksEnum.exShowUnselectedLinks) = 13158600
	End With
	With .Items
		h1 = .AddItem("Task 1")
		.AddBar h1,"Task",#9/21/2006#,#9/23/2006#
		h2 = .AddItem("Task 2")
		.AddBar h2,"Task",#9/25/2006#,#9/27/2006#
		.ItemBar(h2,"",EXG2ANTTLib.ItemBarPropertyEnum.exBarSelected) = True
		.AddLink "L1",h1,"",h2,""
		.Link("L1",EXG2ANTTLib.LinkPropertyEnum.exLinkText) = "L1"
		h3 = .AddItem("Task 3")
		.AddBar h3,"Task",#9/29/2006#,#10/2/2006#
		.AddLink "L2",h2,"",h3,""
		.Link("L2",EXG2ANTTLib.LinkPropertyEnum.exLinkText) = "L2"
	End With
	.EndUpdate 
End With

The following C++ sample makes the links that starts from selected bar being wider, while the rest being transparent:

/*
	Copy and paste the following directives to your header file as
	it defines the namespace 'EXG2ANTTLib' for the library: 'ExG2antt 1.0 Control Library'

	#import <ExG2antt.dll>
	using namespace EXG2ANTTLib;
*/
EXG2ANTTLib::IG2anttPtr spG2antt1 = GetDlgItem(IDC_G2ANTT1)->GetControlUnknown();
spG2antt1->BeginUpdate();
spG2antt1->GetColumns()->Add(L"Tasks");
EXG2ANTTLib::IChartPtr var_Chart = spG2antt1->GetChart();
	var_Chart->PutFirstVisibleDate("9/20/2006");
	var_Chart->PutPaneWidth(0,64);
	var_Chart->PutShowLinksWidth(EXG2ANTTLib::exShowLinksStartFrom,2);
	var_Chart->PutShowLinksStyle(EXG2ANTTLib::exShowLinksStartFrom,EXG2ANTTLib::exLinkDot);
	var_Chart->PutShowLinksColor(EXG2ANTTLib::exShowLinksEndTo,RGB(200,200,200));
	var_Chart->PutShowLinksColor(EXG2ANTTLib::exShowUnselectedLinks,RGB(200,200,200));
EXG2ANTTLib::IItemsPtr var_Items = spG2antt1->GetItems();
	long h1 = var_Items->AddItem("Task 1");
	var_Items->AddBar(h1,"Task","9/21/2006","9/23/2006",vtMissing,vtMissing);
	long h2 = var_Items->AddItem("Task 2");
	var_Items->AddBar(h2,"Task","9/25/2006","9/27/2006",vtMissing,vtMissing);
	var_Items->PutItemBar(h2,"",EXG2ANTTLib::exBarSelected,VARIANT_TRUE);
	var_Items->AddLink("L1",h1,"",h2,"");
	var_Items->PutLink("L1",EXG2ANTTLib::exLinkText,"L1");
	long h3 = var_Items->AddItem("Task 3");
	var_Items->AddBar(h3,"Task","9/29/2006","10/2/2006",vtMissing,vtMissing);
	var_Items->AddLink("L2",h2,"",h3,"");
	var_Items->PutLink("L2",EXG2ANTTLib::exLinkText,"L2");
spG2antt1->EndUpdate();

The following C# sample makes the links that starts from selected bar being wider, while the rest being transparent:

axG2antt1.BeginUpdate();
axG2antt1.Columns.Add("Tasks");
EXG2ANTTLib.Chart var_Chart = axG2antt1.Chart;
	var_Chart.FirstVisibleDate = "9/20/2006";
	var_Chart.set_PaneWidth(0 != 0,64);
	var_Chart.set_ShowLinksWidth(EXG2ANTTLib.ShowLinksEnum.exShowLinksStartFrom,2);
	var_Chart.set_ShowLinksStyle(EXG2ANTTLib.ShowLinksEnum.exShowLinksStartFrom,EXG2ANTTLib.LinkStyleEnum.exLinkDot);
	var_Chart.set_ShowLinksColor(EXG2ANTTLib.ShowLinksEnum.exShowLinksEndTo,13158600);
	var_Chart.set_ShowLinksColor(EXG2ANTTLib.ShowLinksEnum.exShowUnselectedLinks,13158600);
EXG2ANTTLib.Items var_Items = axG2antt1.Items;
	int h1 = var_Items.AddItem("Task 1");
	var_Items.AddBar(h1,"Task","9/21/2006","9/23/2006",null,null);
	int h2 = var_Items.AddItem("Task 2");
	var_Items.AddBar(h2,"Task","9/25/2006","9/27/2006",null,null);
	var_Items.set_ItemBar(h2,"",EXG2ANTTLib.ItemBarPropertyEnum.exBarSelected,true);
	var_Items.AddLink("L1",h1,"",h2,"");
	var_Items.set_Link("L1",EXG2ANTTLib.LinkPropertyEnum.exLinkText,"L1");
	int h3 = var_Items.AddItem("Task 3");
	var_Items.AddBar(h3,"Task","9/29/2006","10/2/2006",null,null);
	var_Items.AddLink("L2",h2,"",h3,"");
	var_Items.set_Link("L2",EXG2ANTTLib.LinkPropertyEnum.exLinkText,"L2");
axG2antt1.EndUpdate();

The following VFP sample makes the links that starts from selected bar being wider, while the rest being transparent:

with thisform.G2antt1
	.BeginUpdate
	.Columns.Add("Tasks")
	with .Chart
		.FirstVisibleDate = {^2006-9-20}
		.PaneWidth(0) = 64
		.ShowLinksWidth(1) = 2
		.ShowLinksStyle(1) = 2
		.ShowLinksColor(2) = RGB(200,200,200)
		.ShowLinksColor(4) = RGB(200,200,200)
	endwith
	with .Items
		h1 = .AddItem("Task 1")
		.AddBar(h1,"Task",{^2006-9-21},{^2006-9-23})
		h2 = .AddItem("Task 2")
		.AddBar(h2,"Task",{^2006-9-25},{^2006-9-27})
		.DefaultItem = h2
		.ItemBar(0,"",257) = .T.
		.AddLink("L1",h1,"",h2,"")
		.Link("L1",12) = "L1"
		h3 = .AddItem("Task 3")
		.AddBar(h3,"Task",{^2006-9-29},{^2006-10-2})
		.AddLink("L2",h2,"",h3,"")
		.Link("L2",12) = "L2"
	endwith
	.EndUpdate
endwith

The following Delphi sample makes the links that starts from selected bar being wider, while the rest being transparent:

with AxG2antt1 do
begin
	BeginUpdate();
	Columns.Add('Tasks');
	with Chart do
	begin
		FirstVisibleDate := '9/20/2006';
		PaneWidth[0 <> 0] := 64;
		ShowLinksWidth[EXG2ANTTLib.ShowLinksEnum.exShowLinksStartFrom] := 2;
		ShowLinksStyle[EXG2ANTTLib.ShowLinksEnum.exShowLinksStartFrom] := EXG2ANTTLib.LinkStyleEnum.exLinkDot;
		ShowLinksColor[EXG2ANTTLib.ShowLinksEnum.exShowLinksEndTo] := 13158600;
		ShowLinksColor[EXG2ANTTLib.ShowLinksEnum.exShowUnselectedLinks] := 13158600;
	end;
	with Items do
	begin
		h1 := AddItem('Task 1');
		AddBar(h1,'Task','9/21/2006','9/23/2006',Nil,Nil);
		h2 := AddItem('Task 2');
		AddBar(h2,'Task','9/25/2006','9/27/2006',Nil,Nil);
		ItemBar[h2,'',EXG2ANTTLib.ItemBarPropertyEnum.exBarSelected] := TObject(True);
		AddLink('L1',h1,'',h2,'');
		Link['L1',EXG2ANTTLib.LinkPropertyEnum.exLinkText] := 'L1';
		h3 := AddItem('Task 3');
		AddBar(h3,'Task','9/29/2006','10/2/2006',Nil,Nil);
		AddLink('L2',h2,'',h3,'');
		Link['L2',EXG2ANTTLib.LinkPropertyEnum.exLinkText] := 'L2';
	end;
	EndUpdate();
end