>>>How about:
>>>

>>>IF TYPE(This.ControlSource)='C'
>>>    if empty(This.InputMask)
>>>       This.InputMask='!'+REPLICATE('X',LEN(EVALUATE(This.ControlSource))-1)
>>>    endif
>>>ENDIF
>>>

>>
>>This.InputMask contains by default a value in the txtField class. I need to detect if at the form designer level, we have overwritten that value.
>

>if dbgetprop('table_name.fieldname', 'field', 'inputmask') == This.InputMask
>   *** then you have not overwritten the input mask
>else
>   *** the input mask ws changed
>endif
>

We don't have anything at the DBC level. What I meant is that we have a K value for the InputMask of our txtField base class. When we add that txtField class in a form and bound it to a field value, we still have a value of K assigned to it as it comes by default. However, if I change that value at form designer level, I would like to detect that so I can't bypass the condition and have my own input mask. It could be none or something else. I remember there was a function that was returning if we are defaulting or not to the parent class.