after studiyng the documantation regarding filedmasks, I am stuck and would like to ask the forum.
I would like to create a fieldmask for invoicenumbers. The mask should only accept numbers and alphanumeric AND only - (Character minus) as separators, no space, no underscore or other characters. The entry could be something between 1 and 100 characters. Minus is allowed no time, one time or multiple times. Any ideas?
These should be valid data: