LRESULT OnDestroy(UINT nMessage, WPARAM wParam, LPARAM lParam, BOOL &bHandled)
LRESULT OnCreate(UINT nMessage, WPARAM wParam, LPARAM lParam, BOOL &bHandled)
LRESULT OnPaint(UINT nMessage, WPARAM wParam, LPARAM lParam, BOOL &bHandled)
BOOL WINAPI EndPaint(_In_ HWND, _In_ const PAINTSTRUCT *)
HDC WINAPI BeginPaint(_In_ HWND, _Out_ LPPAINTSTRUCT)
int WINAPI FillRect(HDC, LPCRECT, HBRUSH)