cannot register window with win32

[syedshan]

Hello every one

In my code I need to make two windows. First window is the main window, the second window is not the main window but I will create it sometime later in the code, But now I want to register it at the beginning of the code. Unfortunately I cannot register.

I cannot understand of any reason. I have shown only the window registration process for the one which fails to register.
please have a look

WNDCLASSEX wMain_class = {0}, wndClass_bmpVid = {0};

	HWND H_M_window;	
	//Main Window
	wMain_class.cbSize=sizeof(WNDCLASSEX);
	wMain_class.style=CS_HREDRAW|CS_VREDRAW;
	wMain_class.lpfnWndProc=(WNDPROC)WinProc;	//call to window procedure function
	wMain_class.hInstance=hInst;
	wMain_class.hCursor=LoadCursor(NULL,IDC_ARROW);
	wMain_class.hbrBackground=(HBRUSH)(COLOR_WINDOW);
	wMain_class.lpszMenuName= MAKEINTRESOURCE(IDR_MYMENU);
	wMain_class.lpszClassName=_T("Window Class1");

	//Second: register them
	if(!RegisterClassEx(&wMain_class)){
		MessageBox(NULL,_T("Could not register classX"),_T("Window Class Failed"),MB_ICONERROR);
	}