Keyboard Functionality implementation

I made a keyboard with some functionalities but i have no idea how to add control functionality.This keyboard is to be used in touch screen.Using the code开发者_如何转开发 given at http://www.codeproject.com/KB/miscctrl/touchscreenkeyboard.aspx

any idea what functionality ctrl will perform ?

Secondly I want this to do actual work like if i click A on this it should write a anywhere as if original key at physical keyboard was pressed.in other words i want to trigger keyboard events

---

To send keyboard commands to windows you will need to pinvoke the SendInput or SendKeys function in user32.dll There is a nice project on codeplex doing exactly what you want.

---

You may want to look at (and work with) the SendKeys (for winforms) and SendInput (for native). And you should also look at this link.