Custom Property textBox with Value Validator

Hello,

I wanted to create a custom Property with Type as Text Box where i wanted to give user a freedom to type any number or character but before submission of form , those values should be validated agains correct set of values. Reason i wanted to do this, coz there is large number of Data which can be presented as DropDown or other mean.

I am not sure if this is possible but read somewhere in vCAC 6.1 Documentation that Data validation is possible.

Please guide me a possible solution for the same.

Thanks in advance,

Br,

MG