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c# key sequence

theone

hi,

just wondering if anybody has any experience in this I'm tryin to simulate a key sequence ctrl + pause/break
I have some sort of idea through reading this http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwindowsformscontrolclasskeydowntopic.asp but i did some searching and it dosen't seem as readily availible as I hoped.

I have no problem simulating ctrl + c for example but the ctrl + pause/break I can't do.

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Tobias Greeshman

The problem with the key combination Ctrl+Pause/Break is that it's a special key combination that get triggered before the KeyDown handler gets access to it. It will terminate/pause a program in execution.

There is a way to get around this, by means of what is called a Keyboard Hook.

Have a look at the Win API Function SetWindowsHookEx

Example: http://delphi.about.com/library/bluc/text/uc063001a.htm

theone

Thanks for that

I'm using it to send a break to a serial device, I could simulate that key sequence by changin the com port settings then simulating the spacebar being held down,but doing it by just simulating the key sequence is a much more efficient way of doing it.

I'll check it out thanks.

theone

got it to work once hasn't worked since though

SendKeys.SendWait("^{BREAK}");

thats under a button click event

that simulates ctrl +pause/break,I'm guessing thats where the hook comes in,but if it worked once can't understand why it won't work again.