DVH> Do you know how to make a window within a window? Every time I try, 
 DVH> the main window's border disappears and I can't find the other 
 DVH> window..

The "multiple document interface" much used by Windows 3.x
applications (i.e. multiple child frames within a parent frame) is
considered outmoded, or at the very least bad style on Presentation
Manager.  The recommended style is to have multiple top-level windows for
different "documents" or views (look at EPM, for example).

Having said that, if you *really* want to have a frame window within
another frame window (i.e. you *aren't* writing an MDI application, but are
actually writing something with a *legitimate* reason for having frame
windows within frame windows), then you'll need to tell us more about the
parent and ownership relationships that you are creating so that we can
tell you where you are going wrong.

For example: One common mistake made by Windows programmers (who don't
realise that the client window is a *different window* to its frame in PM)
is to make the frame of the inner window the child of the frame of the
outer window, rather than a child of its *client window* as it should be. 
Similarly, the owner of the inner window should *not* be the outer window.

 ¯ JdeBP ®

--- FleetStreet 1.19 NR