C / C++ / MFC

TCHAR szClassName[] = _T("Pick Something Unique"); // main window's class name
WNDCLASS wc;                                       // window's class struct

...

// first we must specify the attribs for the window's class
wc.style         = CS_DBLCLKS|CS_HREDRAW|CS_VREDRAW;// style bits
wc.lpfnWndProc   = (WNDPROC)WndProc;                // window procedure to use
wc.cbClsExtra    = 0;                               // no extra data
wc.cbWndExtra    = 0;                               // no extra data
wc.hInstance     = hInstance;                       // associated instance
wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION); // large/small icon
wc.hCursor       = LoadCursor(NULL, IDC_ARROW);     // default cursor
wc.hbrBackground = (HBRUSH)(COLOR_3DFACE+1);        // window background color
wc.lpszMenuName  = MAKEINTRESOURCE(IDR_MAINFRAME);  // load the main menu
wc.lpszClassName = szClassName;                     // class name

// now, we can register this class
RegisterClass(&wc);

...

// use our class to try and create a window
hWnd = CreateWindow(szClassName,        // class to use
                    _T("Hey"),          // title for window
                    WS_OVERLAPPEDWINDOW,// style bits
                    100, 100,           // position (x, y)
                    200, 200,           // width/height
                    NULL,               // no parent
                    NULL,               // no menu
                    hInstance,          // associated instance
                    NULL);              // no extra data