C / C++ / MFC

ForNow wrote:

Second in my message handler the first thing I should is call the default handler
CWnd::OnNcPaint
Calling it at the end will wipe out whatever I have done correct ?

 WNDPROC SafeGetDialogProc(HWND hwnd)
{
    if(IsWindowUnicode(hwnd))
        return (WNDPROC)GetWindowLongPtrW(hwnd, DWLP_DLGPROC);
    else
        return (WNDPROC)GetWindowLongPtrA(hwnd, DWLP_DLGPROC);
}

case WM_NCPAINT: {
         WNDPROC OldHandler = SafeGetDialogProc(hwnd);    // Get dialog handler
         CallWindowProc(OldHandler, hwnd, Msg, wParam, lParam);  // Call old handler
         
         // Do your special draw stuff

         return(0);   // Return zero
     }

HDC hdc;
hdc = GetDCEx(hwnd, (HRGN)wParam, DCX_WINDOW|DCX_INTERSECTRGN);

HBITMAP hBmp;  // This needs to be held somewhere for life of dialog or global
HDC hMemDC;  // This is  the same it needs to be held somewhere for life of dialog or global

hBmp = (HBITMAP) LoadImage(0, "SomeName.Bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE); // Load bitmap file
hMemDC = CreateCompatibleDC(NULL);  // Create memory device context
if (hMemDC) SelectObject(hMemDC, hBmp); // Select the bitmap to any valid memory context

// Optional stuff you might want the loaded bitmap dimensions
BITMAP bm;
GetObject(hBmp, sizeof(bm), &bm); // Get object data
BmpWth = bm.bmWidth; // Get and hold bitmap width to some dialog life variable
BmpHt = bm.bmHeight; // Get and hold bitmap height to some dialog life variable

HDC hdc = GetDCEx(hwnd, (HRGN)wParam, DCX_WINDOW|DCX_INTERSECTRGN); // Get DC
BitBlt(hdc, ???, ???, BmpWth, BmpHt, hMemDC, 0, 0, SRCCOPY); // Transfer bitmap ... ??? are co-ords where to place 

DeleteObject(hBmp); // Release loaded bitmap
DeleteDC(hMemDC); // Release the memory context created above

FriendOfAsherah wrote:

But there is one silly stupid use of the getCond() where the Update() is done in the getCond() code