Code doesn't work

bool CApp::CreateWin(void){	m_hWnd = CreateWindowEx(WS_EX_OVERLAPPEDWINDOW, //the extended style 		                m_szClass,    	        //the class name				m_szTitle,	        //the window's title			        WS_OVERLAPPEDWINDOW,	//the window's style				CW_USEDEFAULT,  CW_USEDEFAULT,	//the position			        m_iWidth,		//the width				m_iHeight,		//the height				NULL,			//no parent window				NULL,			//no menu needed				m_hInstance,	        //the window's instance				NULL );		//nothing to pass to WM_CREATE	if (!m_hWnd)	{		Shutdown( );						return false;				}	return true;}bool CApp::ActivateWindow(void){	ShowWindow( m_hWnd, SW_SHOW );	//Show the window	SetForegroundWindow( m_hWnd );	//Give the window a high priority	SetFocus( m_hWnd );     //Sets the keyboard's focus to the window	return true;}