To actually get the value of the HotkeyControl you need to use the HK_GETKEY message.
Here is the code:
code:
Debug.Trace(Interop.Call('user32','SendMessageW', pPlusWnd.GetControlHandle('NameOfTheHotkeyControl'), (0x0400 /* WM_USER */ +2) /* HK_GETKEY */, 0, 0));