Input-Filter
This property is used to provide a filter to limit the characters that the user can input in the Entry-Field.
The value of this property is a regular expression. Only characters that match the regular expression will appear in the Entry-Field when the user types or pastes them.
 
Example - Create an entry-field that accepts only letters and numbers (no grave letters or special characters allowed)
screen section.
...
  03 screen-1-ef-2 Entry-Field
     line 29.0
     column 49.5
     size 13.1 cells 
     lines 4.6 cells 
     id 19
     3-d
     input-filter "[\sA-Za-z0-9]+"
     .