By default, the PatternChart property is exPatternEmpty. The PatternChartColor property determines the color to be used for pattern. The BackColorChart property determines the unit's background color.  The BackColor property controls the background of the time scale unit being shown in the chart's header. 

The following VB sample changes the pattern for a specified unit, in the chart area:

With G2antt1
	.BeginUpdate 
	With .Chart
		.PaneWidth(False) = 0
		.LevelCount = 2
		.FirstVisibleDate = #1/1/2008#
		.AllowInsideZoom = True
		.AllowResizeInsideZoom = False
		.InsideZoomOnDblClick = False
		With .DefaultInsideZoomFormat
			.PatternChart = exPatternBDiagonal
			.PatternColorChart = RGB(255,0,0)
		End With
		With .InsideZooms
			.SplitBaseLevel = False
			.DefaultWidth = 18
			.Add(#1/4/2008#).AllowInsideFormat = False
		End With
	End With
	.EndUpdate 
End With

The following VB.NET sample changes the pattern for a specified unit, in the chart area:

With AxG2antt1
	.BeginUpdate 
	With .Chart
		.PaneWidth(False) = 0
		.LevelCount = 2
		.FirstVisibleDate = #1/1/2008#
		.AllowInsideZoom = True
		.AllowResizeInsideZoom = False
		.InsideZoomOnDblClick = False
		With .DefaultInsideZoomFormat
			.PatternChart = EXG2ANTTLib.PatternEnum.exPatternBDiagonal
			.PatternColorChart = 255
		End With
		With .InsideZooms
			.SplitBaseLevel = False
			.DefaultWidth = 18
			.Add(#1/4/2008#).AllowInsideFormat = False
		End With
	End With
	.EndUpdate 
End With

The following C++ sample changes the pattern for a specified unit, in the chart area:

/*
	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();
EXG2ANTTLib::IChartPtr var_Chart = spG2antt1->GetChart();
	var_Chart->PutPaneWidth(VARIANT_FALSE,0);
	var_Chart->PutLevelCount(2);
	var_Chart->PutFirstVisibleDate("1/1/2008");
	var_Chart->PutAllowInsideZoom(VARIANT_TRUE);
	var_Chart->PutAllowResizeInsideZoom(VARIANT_FALSE);
	var_Chart->PutInsideZoomOnDblClick(VARIANT_FALSE);
	EXG2ANTTLib::IInsideZoomFormatPtr var_InsideZoomFormat = var_Chart->GetDefaultInsideZoomFormat();
		var_InsideZoomFormat->PutPatternChart(EXG2ANTTLib::exPatternBDiagonal);
		var_InsideZoomFormat->PutPatternColorChart(RGB(255,0,0));
	EXG2ANTTLib::IInsideZoomsPtr var_InsideZooms = var_Chart->GetInsideZooms();
		var_InsideZooms->PutSplitBaseLevel(VARIANT_FALSE);
		var_InsideZooms->PutDefaultWidth(18);
		var_InsideZooms->Add("1/4/2008")->PutAllowInsideFormat(VARIANT_FALSE);
spG2antt1->EndUpdate();

The following C# sample changes the pattern for a specified unit, in the chart area:

axG2antt1.BeginUpdate();
EXG2ANTTLib.Chart var_Chart = axG2antt1.Chart;
	var_Chart.set_PaneWidth(false,0);
	var_Chart.LevelCount = 2;
	var_Chart.FirstVisibleDate = "1/1/2008";
	var_Chart.AllowInsideZoom = true;
	var_Chart.AllowResizeInsideZoom = false;
	var_Chart.InsideZoomOnDblClick = false;
	EXG2ANTTLib.InsideZoomFormat var_InsideZoomFormat = var_Chart.DefaultInsideZoomFormat;
		var_InsideZoomFormat.PatternChart = EXG2ANTTLib.PatternEnum.exPatternBDiagonal;
		var_InsideZoomFormat.PatternColorChart = 255;
	EXG2ANTTLib.InsideZooms var_InsideZooms = var_Chart.InsideZooms;
		var_InsideZooms.SplitBaseLevel = false;
		var_InsideZooms.DefaultWidth = 18;
		var_InsideZooms.Add("1/4/2008").AllowInsideFormat = false;
axG2antt1.EndUpdate();

The following VFP sample changes the pattern for a specified unit, in the chart area:

with thisform.G2antt1
	.BeginUpdate
	with .Chart
		.PaneWidth(.F.) = 0
		.LevelCount = 2
		.FirstVisibleDate = {^2008-1-1}
		.AllowInsideZoom = .T.
		.AllowResizeInsideZoom = .F.
		.InsideZoomOnDblClick = .F.
		with .DefaultInsideZoomFormat
			.PatternChart = 6
			.PatternColorChart = RGB(255,0,0)
		endwith
		with .InsideZooms
			.SplitBaseLevel = .F.
			.DefaultWidth = 18
			.Add({^2008-1-4}).AllowInsideFormat = .F.
		endwith
	endwith
	.EndUpdate
endwith

The following Delphi sample changes the pattern for a specified unit, in the chart area:

with AxG2antt1 do
begin
	BeginUpdate();
	with Chart do
	begin
		PaneWidth[False] := 0;
		LevelCount := 2;
		FirstVisibleDate := '1/1/2008';
		AllowInsideZoom := True;
		AllowResizeInsideZoom := False;
		InsideZoomOnDblClick := False;
		with DefaultInsideZoomFormat do
		begin
			PatternChart := EXG2ANTTLib.PatternEnum.exPatternBDiagonal;
			PatternColorChart := 255;
		end;
		with InsideZooms do
		begin
			SplitBaseLevel := False;
			DefaultWidth := 18;
			Add('1/4/2008').AllowInsideFormat := False;
		end;
	end;
	EndUpdate();
end