Hi, to ask my question, I'm going to give an example. Ok, I have a text box and a command button. In this text box, I write "This is a text box". When I click the command button, I want that in the place of all the letter "X"s from the text box, a "Z" appears (so the text becomes "This is a tezt boz"). Just an example. Ok, is there any way of doing this? Thanks a lot!