I've been doing some basic win32 programming. Just a simple window and a couple of buttons. Now i want to add a child window to my main window

Code:
	SaveButton  = CreateWindow("BUTTON","Save",      WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON,10, 10,80,20,m_hWnd,(HMENU)102,m_hInstance,NULL);
This is how i added a button. I should be able to add a window in the same way if i have defined the window in another file right???

Thanks

P.S. Hope the code tags work, haven't used it before