What: tkbusy
 Where: http://koders.com/tcl/fidDA4B5567EFD3931E8E8AE1FFE99FEDA676B63140.aspx?s=break+continue%|%tkbusy.tcl%|%
 Description: Tk procedure to disable widgets while an application is
        busy.
 Updated:
 Contact: mailto:mike@hightec.saarlink.de (Michael Schumacher)

Also check the `tk busy` command in Tcl 8.6 [http://www.tcl.tk/man/tcl8.6/TkCmd/tk.htm]

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[Michael Schumacher]
!!!!!!
%| [Category Package] | [Category GUI] |%
!!!!!!