Function OnPaint

NULLC/includes/window.cpp:92–97

	}

	void OnPaint(HWND wnd)
	{
		PAINTSTRUCT ps;
		BeginPaint(wnd, &ps);
		EndPaint(wnd, &ps);
	}

	LRESULT CALLBACK WindowProc(HWND hWnd, unsigned int message, WPARAM wParam, LPARAM lParam)
	{