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Askyesno Primitive
If you want users to supply a simple Yes or No response to a
question, use the askyesno
primitive. This primitive has the format
askyesno( message, default, title )
Askyesno returns a true
or false value depending on which button a user selects.
For example, the definition
Married:=askyesno("Are you
married?")
produces the following dialog box:
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