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Re: Stopping bad input (harder than sanitizing)by kcott (Archbishop) |
on Mar 08, 2021 at 07:23 UTC ( [id://11129321]=note: print w/replies, xml ) | Need Help?? |
See the Tk::Entry documentation. In particular, the -validate, -validatecommand and -invalidcommand options (in WIDGET-SPECIFIC OPTIONS) and the entire VALIDATION section. Also see the "Validated entries and password fields." examples in the Widget Demo. — Ken
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