I\'m making a little application for taking notes. So when I type \'note\' anywhere on my computer, my window will pop up and show me a textbox for me to type something in a
Take a look at http://www.codeproject.com/KB/cs/globalhook.aspx
Besides this question has been asked around in SO already. Take a look at here:
Global Keyboard Hooks (C#)
Global keyboard capture in C# application
Best way to tackle global hotkey processing in c#?