Question

I’m trying to write a program with C# that sends text into other windows.
How do I write a command in C# that sends a text into the window that is currently under the users focus?

For example:

If the user clicks an open notepad window, or an open outlook letter, or an open excel sheet, and then clicks the button on my program, a text will be “pasted” directly into the last notepad window/outlook letter/excel cell that the user clicked on last.

I hope my question is clear enough. I’m not so experienced and am missing a lot of terminology.

Answer 1

Take your application out of focus by minimizing or hiding the main window, and then send your text with

SendKeys.SendWait("Hello World!");    

Finally, restore your main window.

---

If the code is executed in the main form, you could do this

this.Visible = false;
SendKeys.SendWait("Hello World!");    
this.Visible = true;