Little paint _GD+, Ho creato questo aggeggino :)

#include <GDIPlus.au3>
#Include <Misc.au3>
#include <GuiConstantsEx.au3>
#include <ScreenCapture.au3>

$dll = DllOpen("user32.dll")
$whitd=@DesktopWidth ;grandezza finestra
$heigth=@DesktopHeight  ;grandezza finestra
$col="0xFF000000" ;colore pennello
$sp=5 ;spessore pennello
$colg="0xFFFFFFFF" ;colore di sfondo non chè colore della gomma




$hGUI = GUICreate("GDI+", $whitd, $heigth)
;GUISetState
GUISetBkColor(0xFFFFFF)
   GUISetState(@SW_SHOW+@SW_MAXIMIZE)


       _GDIPlus_Startup ()
       $hGraphic = _GDIPlus_GraphicsCreateFromHWND ($hGUI)
;$hGraphic = _GDIPlus_ImageGetGraphicsContext ($hImage)
$hBrush1 = _GDIPlus_BrushCreateSolid()
_GDIPlus_BrushSetSolidColor($hBrush1,$col)

Do
$m=MouseGetPos()
       If _IsPressed("01", $dll) Then ;colora testo sinistro
               _GDIPlus_BrushSetSolidColor($hBrush1,$col)
_GDIPlus_GraphicsFillEllipse($hGraphic, $m[0]-($sp/2), $m[1]-($sp/2), $sp, $sp,$hBrush1)


               ElseIf _IsPressed("02", $dll) Then ;cancella tasto destro (gomma)
                       _GDIPlus_BrushSetSolidColor($hBrush1,$colg)
_GDIPlus_GraphicsFillEllipse($hGraphic, $m[0]-$sp, $m[1]-$sp, $sp*2, $sp*2,$hBrush1)


       ElseIf _IsPressed("43",$dll) Then ;scegli colore del pennello [C]
               $cols=_ChooseColor(2)
               $colss=StringReplace($cols,"0x","")
               $col="0xFF"&$colss

       ElseIf _IsPressed("47",$dll) Then ;scegli spessore pennello [G]
               $sp=InputBox("Spessore","Grandezza:",$sp)

       ElseIf _IsPressed("2E",$dll) Then ;resetta schermo Canc
               _GDIPlus_BrushSetSolidColor($hBrush1,$colg)
               _GDIPlus_GraphicsFillRect($hGraphic, 0, 0, $whitd, $heigth,$hBrush1)

               ElseIf _IsPressed("53",$dll) Then ;cambia colore di sfondo [S]
       $cols=_ChooseColor(2)
               $colss=StringReplace($cols,"0x","")
               $colg="0xFF"&$colss
                       _GDIPlus_BrushSetSolidColor($hBrush1,$colg)
               _GDIPlus_GraphicsFillRect($hGraphic, 0, 0, $whitd, $heigth,$hBrush1)
               
       ElseIf _IsPressed("09",$dll) Then ;salva [TAB]
               $file=FileSaveDialog("Salva il file",@DesktopDir,"Immagine (*.jpg)")
               if @error Then
               Else
                       Sleep(500)
                       _ScreenCapture_Capture($file&".jpg")

                       EndIf
               EndIf
   Until GUIGetMsg() = $GUI_EVENT_CLOSE

_GDIPlus_BrushDispose ($hBrush1)
_GDIPlus_GraphicsDispose($hGraphic)
_GDIPlus_ShutDown ()