It don't need complicated as you say. First, i want a textbox on Form1 to always display the same text as a textbox on Form2 when i press a letter key. Second, i have a project about File Explore in Windows, when i want to rename a folder or a file(i have used ListView to show file and folder), i must be add a form named Rename. And i'm stuck here, i can rename file, but can't update file's name in ListView or TreeView.

thanks

thanks

thanks, but i want to transfer data from form2 to form1 by click a button.

i want to transfer data between two form automatic two way, and response by click a button too. Sory because my English is not goog, i'm come from Viet Nam, i'm learning C# my self. This my first time post a Question. :)

How to transfer data between two form ? I found few articles but it is only transmitted in one direction instructions