MSDN links for CreateHatchBrush and Rectangle API functions http://msdn.microsoft.com/en-us/library/dd183504%28v=vs.85%29.aspx http://msdn.microsoft.com/en-us/library/dd162898%28v=vs.85%29.aspx #include <GuiConstants.au3> #include <WindowsConstants.au3> #include <WinAPI.au3> Const $HS_HORIZONTAL = 0 Const $HS_VERTICAL = 1 Const $HS_FDIAGONAL = 2 Const $HS_BDIAGONAL = 3 Const $HS_CROSS = 4 Const $HS_DIAGCROSS = 5 Global $ib_transparent = False $hGui = GUICreate("Hatch Brush