Delete other program files

I need to delete other program in my program uninstall. I coded:

Delete "$PROGRAMFILES\ProgramX\*.*"
RMDir "$PROGRAMFILES\ProgramX"

in the section "Uninstall" but the files stay there after the uninstalling. What´s up?

If you have subfolders in the ProgramX directory they will not be deleted; use this:

RMDir /r "$PROGRAMFILES\ProgramX"

Look in help for more on RMDir.