MagSetWindowFilterList function not remove specified window of screenshot

[flashcoder]

Zitat von Zacherl:

This function works only when Desktop Window Manager (DWM) is off.

@Zacherl,

The C++ example works fine with DWM enable .
And i followed your suggestion below, thank you:

Zitat von Zacherl:

The calling convention of the callback should be stdcall

Delphi-Quellcode:

TMagImageScalingCallback = function (hwnd: HWND; srcdata: Pointer;
    srcheader: MAGIMAGEHEADER; destdata: Pointer; destheader: MAGIMAGEHEADER;
    unclipped: TRect; clipped: TRect; dirty: HRGN): BOOL; stdcall; // definition found in Magnification.pas posted on question 

function ImageScaling(hwnd: hwnd; srcdata: Pointer; srcheader: MAGIMAGEHEADER;
  destdata: Pointer; destheader: MAGIMAGEHEADER; unclipped: TRect;
  clipped: TRect; dirty: HRGN): BOOL; stdcall;
var
  lpbmih: TBitmapInfoHeader;
  lpbmi: TBitmapInfo;
  aBitmap: HBITMAP;
  aDC: HDC;
  bmp: TBitmap;
begin
  Fillchar(lpbmih, SizeOf(lpbmih), 0);
  lpbmih.biSize := SizeOf(lpbmih);
  lpbmih.biWidth := srcheader.width;
  lpbmih.biHeight := srcheader.height;

//...
end;

//...

// calling in MagSetImageScalingCallback api

if (not MagSetImageScalingCallback(hwndMag, TMagImageScalingCallback(@ImageScaling))) then

So, like already said, when i put breakpoint inside my ImageScaling function, debug not go to function, then i noted that this callback function not is executed.

Here is how be is C++ code:

Code:

typedef BOOL (CALLBACK* MagImageScalingCallback)(HWND hwnd, void * srcdata, MAGIMAGEHEADER srcheader, void * destdata, MAGIMAGEHEADER destheader, RECT unclipped, RECT clipped, HRGN dirty );

//...

BOOL MagImageScaling(HWND hwnd, void *srcdata, MAGIMAGEHEADER srcheader, 
                void *destdata, MAGIMAGEHEADER destheader, 
                RECT unclipped, RECT clipped, HRGN dirty)
{
   // Setup the bitmap info header
      bmif.biSize = sizeof(BITMAPINFOHEADER);
      bmif.biHeight = srcheader.height;
      bmif.biWidth = srcheader.width;

//...
}

if (!MagSetImageScalingCallback(hwndMag, (MagImageScalingCallback)MagImageScaling))