void accessSpecialLabel()
{
	GraphLayer gl = Project.ActiveLayer();
	if(!gl)
		return;
	
	Axis aX = gl.XAxis;
	if(!aX)
		return;
	
	Tree trFormat;
	// need to change the Special setting to get the corresponding tree node
	trFormat = aX.GetFormat(FPB_ALL, FOB_ALL, TRUE, TRUE);  // get the tree format of X axis
	out_tree(trFormat);  // output tree format, then can see the tree node you want
	
	// set the tree node value you want
	trFormat.Root.Labels.BottomLabels.Custom.Special.Type.nVal = 3;  // set to Manual
	trFormat.Root.Labels.BottomLabels.Custom.Special.Label.nVal = 0;  // set label to 0, no decimal place
	trFormat.Root.Labels.BottomLabels.Custom.Special.Value.dVal = 0.0;  // value point to set
	
	int nErr = aX.UpdateThemeIDs(trFormat.Root);
	if(0!=nErr)
		out_str("Error");
	
	aX.ApplyFormat(trFormat, true, true, true);  // apply format to X axis
}