Do simple validation with the Datawindow properties

digit only, length unknown

[validation tab]
match(gettext(), '^[0-9]+$')

digit only, length fixed

[edit tab]
style : EditMask  mask : #####

[validation tab]
len(gettext())=5

digit, '%' or '"_"

[validation tab]
match(gettext(), '^[0-9%_]+$')

digit only and must end with "%"

[validation tab]
match(gettext(), '^[0-9]+[%]$')

canadian postal code

[edit tab]
style : EditMask  mask : !#! #!#

[validation tab]
match(gettext(), '^[a-z][0-9][a-z][0-9][a-z][0-9]$')