"Ge van Geldorp" ge@gse.nl wrote:
- GWL_HINSTANCE is not defined on Win64, hInstance is documented as not required in CreateWindowEx calls
- HINSTANCE hInstance = (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE);
- HINSTANCE hInstance;
Please use
HINSTANCE hInstance = GetWindowLongPtr(hWnd, GWLP_HINSTANCE);
instead.