Thanks for the that.

The problem however is that I still want to restrict the user from
input of a large InputMask.

The example

Field One, if used, is restricted to an input of 9999.99
Field Two, if used, is restricted to an input of 99999.99.
The user can input into only one of the two fields.

If Field One is chosen, the Field Two will autofilled to a possible
999999.99 max. However, if the user changes his/her mind, and/or edits
and wants to use Field Two, it must only have a InputMask of 99999.99, (i.e one less digit)

Whilst long drawn out code within each field could be achieved, it a long task.
Especially as I have five fields within the same input function.
?