Keydown on minimized form !

I've found some documentation here but I still have problems: http://www.pinvoke.net/default.aspx/user32.RegisterHotKey I want to get all inputs from keyboards and make some of them shortcuts for some scripts. For example if I entered erun anywhere on the screen from keyboard the program will run the internet explorer immediately. Another simple sample is if I entered thk the program will return me "Thank you very much.. " string instead of thk. I couldn't make it happen! I can only define shortcuts with this way. If I define all letters as shortcut to get them when I entered then I cannot write them to the screen because of they're shortcut. Is there any solution for this? thanks..