Cheat Engine

Slugsnack · Posted: Sat Aug 16, 2008 12:57 pm Post subject: PostMessage Sending Twice ?

I was under the impression that with windows messages for key presses, I would have to send a WM_KEYDOWN and then a WM_KEYUP but I found that when I did this, the 2 messages that were put onto the message queue resulted in the message being sent twice ?!

For example, if I send the letter 'a' to notepad with the above method, it weirdly results in notepad displaying 'aa' and so on. It works perfectly once I remove the WM_KEYUP but I just find it a bit odd. Surely when a key is pressed (at a hardware level) two messages are sent to the message queue then ?

dnsi0 · Posted: Sat Aug 16, 2008 1:20 pm Post subject:

I think its simply because u sent 2 messages. ONe for key down one for key up. But I don;t know if Im right thou.

Zand · Posted: Sat Aug 16, 2008 5:32 pm Post subject:

I think it's because you sent keydown???

So it presses the key down until you release it.

Use WM_CHAR once for what you're doing

Slugsnack · Posted: Sun Aug 17, 2008 3:41 am Post subject:

Well the call to KEYUP is directly after the call to KEYDOWN. I just figured that when you press a key by hand that is what happens, key goes down then back up. I will try your suggestion then.