It's not "to get". This class, as many typical MFC classes, is a mere C++ wrapper around a window object referenced via its
HWND
.
Here:
https://msdn.microsoft.com/en-us/library/22x4kb1k.aspx[
^].
Please, get a habit to find everything in documentation by yourself. This forum is more for real problems, hard or maybe even very simple, but real.
—SA