Documentation for this [Tk] command can be found at http://purl.org/tcl/home/man/tcl8.4/TkCmd/destroy.htm ---- The destroy command is used to destroy Tk windows -- not just [toplevel] windows, it can just as well destroy individual widgets within a window (in which case the not explicitly destroyed siblings continue to exist). ---- I recently came across a major problem where my application was leaking huge amounts of memory (over 100 MB). I was using the Img extension and I was loading many graphics into memory, but I was not deleting them with ''image delete''. I fixed this problem by binding the close button and the event to a proc which deleted all photos loaded in memory once I was done with them. I learned that before destroying a toplevel, even in Tcl you have to release resources that you are not using anymore ;D ''Ro'' ---- [Tk syntax help] - [Arts and crafts of Tcl-Tk programming] - [Category Command]