how to modify this code, so that a thin colored line can appear in the middle of the screen to divide the screen into 2 parts?

[jacky998877]

#include <WindowsConstants.au3>
#include <WinAPI.au3>
#Include <GDIPlus.au3>

_GDIPlus_Startup ()

$hDC = _WinAPI_GetWindowDC(0)

$hGraphic = _GDIPlus_GraphicsCreateFromHDC($hDC)
$Color = 0xFF000000
$hPen = _GDIPlus_PenCreate($Color,2)


For $y = 0 to 30
    For $x = 0 to @DesktopWidth Step 5
        _GDIPlus_GraphicsDrawLine($hGraphic, @DesktopWidth/2, 0, $x, @DesktopHeight, $hPen)
        $Color += Hex(2)
        _GDIPlus_PenSetColor($hPen, $Color)
    Next
Next


_WinAPI_RedrawWindow(_WinAPI_GetDesktopWindow(), 0, 0, $RDW_INVALIDATE+$RDW_ALLCHILDREN)
_WinAPI_ReleaseDC(0, $hDC)
_GDIPlus_Shutdown()

Edited February 21, 2023 by jacky998877

[mistersquirrle]

Just modifying that code?

#include <WindowsConstants.au3>
#include <WinAPI.au3>
#Include <GDIPlus.au3>

_GDIPlus_Startup ()

$hDC = _WinAPI_GetWindowDC(0)

$hGraphic = _GDIPlus_GraphicsCreateFromHDC($hDC)
$Color = 0xFF000000
$hPen = _GDIPlus_PenCreate($Color,2)

_GDIPlus_GraphicsDrawLine($hGraphic, 0, @DesktopHeight/2, @DesktopWidth, @DesktopHeight/2, $hPen)

_WinAPI_RedrawWindow(_WinAPI_GetDesktopWindow(), 0, 0, $RDW_INVALIDATE+$RDW_ALLCHILDREN)
_WinAPI_ReleaseDC(0, $hDC)
_GDIPlus_Shutdown()

However there's some issues with it, such that anything that updates on the screen will remove your painted line. If you want to create a presistent overlay, check out this thread/post from Melba: