Sending char to other windows controls

I have a simple question in visual basic.I want to send to ANY WINDOWS FORMS.(EXCEL,WORD,CALCULATOR,INTERNET EXPLORER,NOTEPAD,OTHER PROGRAMS THAT I LOADED TO MY COMPUTER...)

I want to send strings from each windows forms.(like using clipboards but its different.)

I have a button and when i clicked also i want to send a string to a web form.

Likewww.microsoft.com when i clicked my button i want to send to a string(like "a") to textbox inwww.microsoft.com web form.

Maybe i can tell you my problem how is about.

THANK YOU FOR YOUR SUPPORT.

[758 byte] By [Legacyofkain] at [2007-12-23]