graphical interface, and then used the graphical interface to add a Date
Time Picker control to it.  The only problem is, I don't know how to do
anything with the Date Time Picker, like access the date selected within the
control.  All I have is the ID, which in my code is IDC_DATETIMEPICKER1.
Could someone tell me how to get some kind of handle to this control?  The
msdn example, using the CreateWindowEx function, makes it easy to access a
HWND to the Date Time Picker; is there a way I can get a HWND without first
using CreateWindowEx?  Thanks in advance!

Hmm is this MFC ? Cuz with .Net, a member is automatically generated. IIRC
with MFC this can be done by right-clicking the form or control in design
view and then select "Add member".

graphical interface, and then used the graphical interface to add a Date
Time Picker control to it.  The only problem is, I don't know how to do
anything with the Date Time Picker, like access the date selected within the
control.  All I have is the ID, which in my code is IDC_DATETIMEPICKER1.
Could someone tell me how to get some kind of handle to this control?  The
msdn example, using the CreateWindowEx function, makes it easy to access a
HWND to the Date Time Picker; is there a way I can get a HWND without first
using CreateWindowEx?  Thanks in advance!

Look up the macros DateTime_SetRange (), DateTime_SetSystemtime () and
DateTime_GetSystemtime () to use the control. The handle can be had if you
know the ID, dlg.GetDlgItem (IDC_DATEPICKER)->m_hWnd.