NM> Hello g00r00 and thanks for all your replies, please, just another one
 NM> :-))) I created the private messages menu and inside there is the choice
 NM> "write message". I would like a box with 2 items to open: emails and
 NM> netmails, I think it should be done with a generic prompt of choosing a
 NM> or b but I don't know how to do it, could you help me please?

There are a few ways to do it.  You can create a lightbar menu to do it or you could use a traditional menu and change the menu prompt to use the #V mci code to create a list of options.

I created a quick "boxmenudemo.mnu" that gives an example of the second option for you that you can download from /downloads/prealpha on the mysticbbs.com website.  Make sure you go into Menu Settings (/S) which is where you'd place the options.

There is a reference here on the MCI code used:
http://wiki.mysticbbs.com/doku.php?id=displaycodes

... This virus requires Microsoft Windows 3.x

--- Mystic BBS v1.12 A49 2023/01/28 (Windows/64)