CreateDirectory and CreateShortCut

What exactly happens when CreateDirectory and CreateShortCut execute and find that their targets already exist?

I ask this in the context of running an installer more than once, perhaps to replace missing files, etc.

Also, could I get an explanation of what "recursive" means as applied to file functions?

CreateDirectory does nothing and CreateShortCut replaces. A simple test can show this.

CreateDirectory $INSTDIR

CreateDirectory $INSTDIR

CreateShortcut $INSTDIR\blah.lnk $INSTDIR\blah.exe

CreateShortcut $INSTDIR\blah.lnk $INSTDIR\blah2.exe

A recursive function is a function calling itself. In file systems, this usually means the function calls itself for every directory it finds so it'll pass on every file and directory beneath a given path.

I forgot to thank you earlier for your valuable help. . . . Thanks, kichik!