You've just selected a user defined X-it button. The default
is loading this file (usercmd.txt) with Notepad
(notepad.exe). You can change this button to launch any
program - simply go to the X-it options screen and enter a
program name in the user command field, followed by any
parameters. If you don't need this, simply leave the user
command field blank, and the user defined titlebar button
will not be displayed.

You can select any command for the user command - similar
to using 'Run' from the start menu. For DOS programs, it is
recommended to use the PIF file that relates to the program,
so it launches with the correct settings, such as windowed
rather than full screen. For example, use DOSPRMT.PIF rather
than COMMAND.COM to launch a DOS session (both files are in
the WINDOWS directory).