Good point.. here is the link for the solution that helped me. http://social.msdn.microsoft.com/forums/en-US/msbuild/thread/8d761321-304b-41d0-8cb5-eac9a21efd01[^] The link was giving to me by PsychoCoder

danzar wrote: I know its a bad habbit I have. sorry No need to apologize to me. My suggestions are offered so you can improve your situation.

Thank you. I thought I had searched the MSDN forums good before posting But as always I was wrong..\ Thank you Danzar

Hi danzar, the way I read the documentation on KEYBDINPUT structure, you must specify a valid dwExtraInfo "Specifies an additional value associated with the keystroke. Use the GetMessageExtraInfo function to obtain this information" so I think your zero value is not good enough. BTW: I noticed the mouse struct is smaller than the keyboard struct, but the original INPUT has a union, so its size must accomodate the largest of them (once you try my INPUTM, it would fail if you don't take care of that!). :) Luc Pattyn [Forum Guidelines] [My Articles] this months tips: - use PRE tags to preserve formatting when showing multi-line code snippets - before you ask a question here, search CodeProject, then Google