C / C++ / MFC

RealValue = 100 - MyCSliderCtrl.GetValue();

Baltoro wrote:

In the underlying Win32 API (the way it was done before GDI+), the client area of a window is painted by a call to BitBlt (or similar function), and then Invalidate, and finally Update.
A similar functionality exists in NET, but it is packaged differently. The Control class (which acts as a container for your image display) implements the Invalidate and Update methods. It's confusing at first glance, but, the Windows graphics system considers rendering a graphic to a window (or control surface) an expensive operation, so the Invalidate method exists so that windows stores the area to be repainted and then, when it recieves the next WM_PAINT message it actually displays the graphic. This is why when you resize or move a window it displays the refreshed image (a Re-size or move generate a WM_PAINT message.) If you call Update() on your control immediately after your drawing code is executed it should immediately display the refreshed image.

Valdyr wrote:

Bitmap FrameBuffer((BITMAPINFO*) &((*BMPSlika).InfoHeader), (*BMPSlika).PixelData);

Bitmap FrameBuffer(&(BMPSlika->InfoHeader), BMPSlika->PixelData);

Mark Salsbery
Microsoft MVP - Visual C++

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, 
   WPARAM wParam, LPARAM lParam){
   PAINTSTRUCT  ps;
   HDC		hdc;

   switch(message){
   case WM_PAINT:
	 hdc = BeginPaint(hWnd, &ps);
	 Prikaz(hdc);
      return 0;
   case WM_DESTROY:
      PostQuitMessage(0);
	  SnimiBitmap();
      return 0;
   default:
      return DefWindowProc(hWnd, message, wParam, lParam);
   }
}

void Prikaz(HDC hdc){
    Graphics graphics(hdc);
    Render();
    Bitmap FrameBuffer((BITMAPINFO*) &((*BMPSlika).InfoHeader), (*BMPSlika).PixelData);
    graphics.DrawImage(&FrameBuffer,0,0);
}

Mark Salsbery
Microsoft MVP - Visual C++

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, 
   WPARAM wParam, LPARAM lParam){
   PAINTSTRUCT  ps;
   HDC		hdc;

   switch(message){
   case WM_PAINT:
	 hdc = BeginPaint(hWnd, &ps);
	 Prikaz(hdc);
      return 0;
   case WM_DESTROY:
      PostQuitMessage(0);
	  SnimiBitmap();
      return 0;
   default:
      return DefWindowProc(hWnd, message, wParam, lParam);
   }
}