[Solved] Pop up window form application with C#


I believe the technique you’re looking for is answered in this article: c++: How to catch mouse clicks wherever they happen.

What you would do is create a global mouse hook and use it to determine whether a user has clicked in a text box. If they have, you can pop up your keyboard and post the completed text back to the text box. I would suggest using the clipboard to paste the keyboard text into the text box.

solved Pop up window form application with C#