Sample Code - WinAPI : How to Get Window Width and Height size on WM

[C++] WinAPI : How to Get Window Width and Height size on WM_SIZE

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message) 
     {
         // The code for handling other Windows messages has been omitted for clarity.
         // ...
        case WM_SIZE:
            {
                INT nWidth = LOWORD(lParam);
                INT nHeight = HIWORD(lParam);
            }
            break;
    }
}