IsWhite, Red, Black, Green....?

[k4ni]

dankeee
Nur dann sollte das so eigenglich klappen oder?

Delphi-Quellcode:

procedure TForm1.Button1Click(Sender: TObject);
var
 DCanvas: TCanvas;
 DHandle: HWND;
begin
 DHandle:=GetDC(0);
 if DHandle<>0 then
 begin
   try
     DCanvas:=TCanvas.Create;
     try
     if DCanvas.Pixels[5, 5] = clWhite
       then ShowMessage ('x');
     finally
       DCanvas.Free;
     end;
    finally
      if ReleaseDc(0, DHandle)<>1 then
        RaiseLastOSError;
    end;
 end
 else
   RaiseLastOSError;
end;