Hi Sudarshan

Your solution will not work. I am going to try to phrase the problem diferently.

If you have a form with four text controls txtVa,txtVb,txtVf and txtValue :

txtVa = with a numeric value enter by the operator (ex: 10)
txtVb = with a numeric value enter by the operator (ex: 56)
txtVf = with a formula value enter by the operator (ex: (a*b)+100
txtValue = I want to put the result Inmediately in this control box = 660

Something like the macro substitution in Visual Foxpro.

a=10
b=56
c="(a*b)+100"
?c
(a*b)+100
?&c
660

This is a very powerfull command, I could not find a easy way to doit with VBasic.

Thanks