Default in Textbox

[Drunkenneo]

I have a text box in Form which i need use should only enter the numbers:

for eg:
When new form appears SI [space]#### should be there and even user needs he or she can change SI to PI and enter the required data.

And the data should go as SI #### or PI #### in Table Backend. The Textbox is Unbound.

 

[Mihail]

Create for this 2 fields in the BE table.
One field will allow only SI or PI values, the other one will store the numbers.
Bound your text box to the second field and a combo box to the first field.

 

[Drunkenneo]

Any other way where i dont have to use combo box