I think Windows are Windows.

Windows have a DC, A menu, and some other stuff, The DC has a Bitmap, a font, a region, a backcolour and some other stuff. There's a Create Window API

Code:
Public Declare Function CreateWindowEx Lib "user32" Alias "CreateWindowExA" (ByVal dwExStyle As Long, ByVal lpClassName As String, ByVal lpWindowName As String, ByVal dwStyle As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hWndParent As Long, ByVal hMenu As Long, ByVal hInstance As Long, lpParam As Any) As Long
but I don't know how to use it.

Hope this Helps