C++ Native Win32 simple Edit Control

I'm currently experimenting with making a little native Win32 executable. So no external libraries/wrappers/frameworks. I added a simple edit control and a button. The problem is that I can't change the text of an Edit Control in the Properties window of Visual Studio. The default text is Sample edit box and that doesn't show up in the Properties window (IDC_EDIT1), so I can't change it.

How can I change the text of an Edit Control (preferably within the properties window)? Also, is an edit control part of the MFC library?