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Which is preferred, method 1 or method 2? Method 1: LRESULT CALLBACK wpMainWindow(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam) { switch (msg) { case WM_PAINT: { HDC hdc; PAINTSTRUCT ps; RECT rc; GetClientRect(hwnd, &rc); hdc = BeginPaint(hwnd, &ps); // drawing here EndPaint(hwnd, &ps); break; } default: return DefWindowProc(hwnd, msg, wparam, lparam); } return 0; } Method 2: LRESULT CALLBACK wpMainWindow(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam) { HDC hdc; PAINTSTRUCT ps; RECT rc; switch (msg) { case WM_PAINT: GetClientRect(hwnd, &rc); hdc = BeginPaint(hwnd, &ps); // drawing here EndPaint(hwnd, &ps); break; default: return DefWindowProc(hwnd, msg, wparam, lparam); } return 0; } In method 1, if msg = WM_PAINT when wpMainWindow function is called, does it allocate memory for all the variables on the stack at the beginning? or only when it enters the WM_PAINT scope? Would method 1 only use the memory when the message is WM_PAINT, and method 2 would use the memory no matter what msg equaled?

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