public Win32WindowDemo() {
// define new window class
WString windowClass = new WString("MyWindowClass");
HMODULE hInst = Kernel32.INSTANCE.GetModuleHandle("");
WNDCLASSEX wClass = new WNDCLASSEX();
wClass.hInstance = hInst;
wClass.lpfnWndProc = Win32WindowDemo.this;
wClass.lpszClassName = windowClass;
// register window class