#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>
#include <ScreenCapture.au3>
#include <WinAPICom.au3>
#include <WinAPIConv.au3>
#include <WinAPIHObj.au3>

Example()

Func Example()
        _GDIPlus_Startup()
        Local Const $iW = @DesktopWidth / 2, $iH = @DesktopHeight / 2
        Local $hGUI = GUICreate("GDI+ test", $iW, $iH, -1, -1)
        GUISetState(@SW_SHOW)

        Local $hHBmp = _ScreenCapture_Capture("", 0, 0, @DesktopWidth / 2, @DesktopHeight / 2) ;create a GDI bitmap by capturing 1/4 of desktop
        Local $hBitmap = _GDIPlus_BitmapCreateFromHBITMAP($hHBmp) ;convert GDI bitmap to GDI+ bitmap
        _WinAPI_DeleteObject($hHBmp) ;release GDI bitmap resource because not needed anymore

        Local $sImgCLSID = _GDIPlus_EncodersGetCLSID("jpg") ;create CLSID for a JPG image file type
        Local $tGUID = _WinAPI_GUIDFromString($sImgCLSID) ;convert CLSID GUID to binary form and returns $tagGUID structure
        Local $tParams = _GDIPlus_ParamInit(1) ;initialize an encoder parameter list and return $tagGDIPENCODERPARAMS structure
        Local $tData = DllStructCreate("int Quality") ;create struct to set JPG quality setting
        DllStructSetData($tData, "Quality", 10) ;quality 0-100 (0: lowest, 100: highest)
        Local $pData = DllStructGetPtr($tData) ;get pointer from quality struct
        _GDIPlus_ParamAdd($tParams, $GDIP_EPGQUALITY, 1, $GDIP_EPTLONG, $pData) ;add a value to an encoder parameter list
        Local $pStream = _WinAPI_CreateStreamOnHGlobal() ;create stream
        _GDIPlus_ImageSaveToStream($hBitmap, $pStream, $tGUID, $tParams) ;save the bitmap in JPG format in memory
        Local $hBitmapFromStream = _GDIPlus_BitmapCreateFromStream($pStream) ;create bitmap from a stream (here from the JPG in memory)

        Local $hGraphics = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;create a graphics object from a window handle
        _GDIPlus_GraphicsDrawImage($hGraphics, $hBitmapFromStream, 0, 0) ;display streamed image

        While 1
                Switch GUIGetMsg()
                        Case $GUI_EVENT_CLOSE
                                ExitLoop
                EndSwitch
        WEnd

        ;cleanup resources
        _GDIPlus_GraphicsDispose($hGraphics)
        _GDIPlus_BitmapDispose($hBitmap)
        _GDIPlus_BitmapDispose($hBitmapFromStream)
        _GDIPlus_Shutdown()
        GUIDelete($hGUI)
EndFunc   ;==>Example