Write an OnGetText handler to perform custom processing for the DisplayText and Text properties. Use OnGetText to format the Value of the field differently when it must be edited from the format used when simply displaying the value, or use OnGetText to display something other than the field's value when it is displayed. 

If there is no OnGetText handler, the value of the DisplayText and Text properties is simply the value of the AsString property. 

AsString 

DisplayText 

OnSetText 

Text 

Value 

Handling Events 

Using Default Formatting for Numeric