SendKeys - Windows Message {Now Resolved, but, Freaky Update}

Hey all, this will be a different question from your normal SendKeys questions, but does anyone know for sure which Windows Messages SendKeys uses? The best I can find is that it uses WM_KEYDOWN/CHAR/KEYUP.

Is this accurate?

May be the SendInput API ?

No, that is not what I am looking for. SendKeys uses Window Messages to put the desired text into a text field, I am sure the ones I have listed are correct. I was just wondering if anyone here had some different information.

Thanks.

Just to give more information, I need this information to know whether or not it is possible to block SendKeys from placing text into the textbox of a program.

So if anybody knows if the messages are different, please let me know.

Thanks.

You still want the user to be able to edit info, but just block sendkeys?

That is the idea, my friend and I are testing it now. Just as an FYI I will post the results here. I fear that I am right and inthat case, will not be able to block SendKeys withing blocking keyboard input.

Success! It turns out there is a slight difference between SendKeys and an actual keyboard event...

If you're actually typing, it goes WM_KEYDOWN WM_CHAR WM_KEYUP.... yet, sendkeys does those three as WM_KEYDOWN WM_KEYUP WM_CHAR

So, it can be singled out and blocked. Thanks for your help David & Prank.

Odd, it turns out the original finding of the WM_ Messages being out of order from a normal keystroke was a one time fluke or an every now and then fluke. 99.9999% of the time the WM_ Messages are identical to a keystroke form the keyboard.

Just thought I would share.

Quote:

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Originally Posted by Spajeoly

Odd, it turns out the original finding of the WM_ Messages being out of order from a normal keystroke was a one time fluke or an every now and then fluke. 99.9999% of the time the WM_ Messages are identical to a keystroke form the keyboard.

Just thought I would share.

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What OS did you test this under? I wonder if this is true across all Windows operating systems.

Sorry for the delay, Hack. This was Windows XP tested only.

Are you still looking for a solution to this?

If you sink a low-level keyboard hook then you can distinguish between the user pressing the keyboard (which will be registered by the hook) or using SendKeys (which won't register) - more info: http://www.codeguru.com/vb/gen/vb_sy...icle.php/c4829

Well, I don't know as it was resolved other ways... But thanks for the link, Bush. I am not sure my friend is looking to do a keyboard hook. Who knows though, he is a bit insane when it comes to his coding.