By default, the ItemDividerLine property is SingleLine. The ItemDividerLine property specifies the type of line that underlines a divider item. Use the ItemDivider property to define a divider item. Use the ItemDividerLine and ItemDividerAlignment properties to define the style of the line into the divider item. Use the CellMerge property to merge two or more cells. Use the ItemDivider property to draw a divider item.

The following Template draws a custom line ( from a skin object ) between two items:

BeginUpdate

VisualAppearance.Add(1, "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")

BackColor = RGB(255,255,255)
MarkSearchColumn = False
ConditionalFormats
{
	Add("%1 >4")
	{
		Bold = True
		StrikeOut = True
		ForeColor = RGB(255,0,0)
		ApplyTo = 1
	}	
	Add("%2 > 4")
	{
		Bold = True
		StrikeOut = True
		ForeColor = RGB(255,0,0)
		ApplyTo = 2
	}	
	Add("%3 > 4")
	{
		Bold = True
		StrikeOut = True
		ForeColor = RGB(255,0,0)
		ApplyTo = 3
	}	
	Add("1")
	{
		Bold = True
		ApplyTo = 4
	}
}
Columns
{
	"Name"
	"A"
	{
		AllowSizing = False
		Width = 24
	}
	"B"
	{
		AllowSizing = False
		Width = 24
	}
	"C"
	{
		AllowSizing = False
		Width = 24
	}
	"A+B+C"
	{
		AllowSizing = False
		Width = 64
		ComputedField = "%1+%2+%3"
	}
}
Items
{
	Dim h, h1
	h = AddItem("Root")
	CellCaptionFormat(h,4) = 1
	h1 = InsertItem(h,,"Child 1")
	CellCaption(h1,1) = 7
	CellCaption(h1,2) = 3
	CellCaption(h1,3) = 1
	h1 = InsertItem(h,,"Child 2")
	CellCaption(h1,1) = 2
	CellCaption(h1,2) = 5
	CellCaption(h1,3) = 12
	ExpandItem(h) = True

Dim k	
k = AddItem("")
ItemDivider(k) = 0
ItemDividerLine(k) = 0
ItemHeight(k) = 4
SelectableItem(k) = False
ItemBackColor(k) = 16777216

	h = AddItem("Root")
	CellCaptionFormat(h,4) = 1
	h1 = InsertItem(h,,"Child 1")
	CellCaption(h1,1) = 7
	CellCaption(h1,2) = 3
	CellCaption(h1,3) = 1
	h1 = InsertItem(h,,"Child 2")
	CellCaption(h1,1) = 2
	CellCaption(h1,2) = 5
	CellCaption(h1,3) = 12
	ExpandItem(h) = True

}
EndUpdate

The sample loads the skin file using the Add method, and the ItemBackColor(k) = 16777216, specifies that skin with the skin with the identifier 1 ( the 16777216 is the 0x1000000 in hexa representation ) paints the item's background.