Cheat Engine

Tryst · Posted: Thu Jun 10, 2010 2:10 am Post subject: Need help with PostMessage in C#

Hey guys, I'm trying to make a simple auto-attack bot and I'm struggling with PostMessage (which I think is the function I need to use to send keystrokes over to the game).

I am able to post keys, but it doesn't affect the in-game hotkeys. For example, if I open messenger (or anything I can type into in-game) and send "a", using the below code, it will work:

Uzeil · Moderator Reputation: 6 Joined: 21 Oct 2006 Posts: 2411

It isn't C#, it's the game. I remember in one game I had the exact same issue as you, but once I wrote a wrapper for PMA to set up the call frame then call the address afterwards(so I could skip a hook), it worked. Another possibility being that they use a keyboard hook to read your key presses for the game instead of processing messages to try and counter the everyday bot-maker.

Ah, another possibility is that you need to get a handle for what you can think of as a window inside your window, and use that as your hWnd instead.

Stylo · Posted: Thu Jun 10, 2010 4:05 am Post subject:

I'm guessing you should left shifting the key
umm.. i haven't used it for ages, it's something like

Tryst · Posted: Thu Jun 10, 2010 7:47 am Post subject:

Okay, I now have this, but I'm getting 2 errors:

blitz02 · Cheater Reputation: 0 Joined: 28 Feb 2007 Posts: 44

Hi Tryst!

I was about to post an exact same topic like this.
Basically we have the same issues regarding this matter.

So to extend your information about that,
I would share this what I have researched.

From my understandings(Correct me if I'm wrong).
A simple PostMessage code like that won't run inside a Game who uses DIRECTINPUT.

So even you test the PMA code outside, it'll be different inside the game.
If that game doesn't use Gameguard or any Anti-Hack. You can try SendInput which is the only API that sends the DirectInput keys.(Based on my researches).

But if it uses Gameguard or any Anti-Hack, for sure SendInput would be hooked. From my researches, we cannot use the 5-byte Trampoline to SendInput and the last resort would be creating a driver.

So like I said I was here to post a new topic again, but I just saw yours. I guess I'll just collide my question here.

Can PMA/SMA use DirectInput as the keystrokes we we're sending?
I used PMA to test some keystrokes(with the normal code at the first post), only spacebar worked properly the way I like. Unlike other( Arrow Key, Control Key ), they aren't working.

Majority of the statements at google, SendInput was the only one(Among PMA/SMA) who can use the DirectInputs. But I guess I won't believe it until I heard it from here.

If there is an alternative way(except from coding a driver), please help us.

@Tryst
I hope the information levels our confused mind.

Tryst · Posted: Thu Jun 10, 2010 8:06 am Post subject:

I had read up about SendInput, but from what I gathered I think that requires the game to be the active window in order to work. I'd much prefer my bot to allow minimised botting.

I wasn't aware that this was a DirectInput issue though, and I'm pretty sure there's a way around it!

hcavolsdsadgadsg · Posted: Thu Jun 10, 2010 3:18 pm Post subject:

SendInput will work if you feed it DirectInput scan codes.

blitz02 · Cheater Reputation: 0 Joined: 28 Feb 2007 Posts: 44