Is there a way to prevent users to close a FileMaker application with the little (x) in the upper right corner (Windows).

I need to force the users to use a 'Close' button, so a script can run some needed routines at closing an application.

TIA

The answer is yes, by using a custom menu, but it sounds like you don't need it. Filemaker has the option, under "File Options" to run a scripts on open and close.

Runtime solutions do exactly this. The close window option is removed on Mac and PC.

I'm not sure that custom menus lets you remove the 'close window' option, viz the "x" in Windows or teh Red "o" on Mac.

There is a difference between running a script when a window closes, and running a script when the file closes. A file can have multiple windows, and FMP only traps and allows the execution of a script when the *last* window of a file is closed. (Look in File Options to set up the close script.)