Well... i know how Multiline property is working. It gives you a chance to use more than one line But... i would like to have a TextBox, which can be changed in the middle of running a program. From Multiline = True to Multiline = False and reverse. You can see that it's possible, but VB says that it's a read-only property. I would just like to know if it's doable, and if it is, how.