Searching through memory

[Fenryr]

This is a problem i've been having for a long time now, and i've been totally unable to figure it out. Basicall, what i want to be able to do is search through a program's memory(i already know how to access it) and find a value. The closest i've been able to come is to start at a given address and look at it's value, and use loop statements to increase the address until the value at the address is equal to the value i want to find, but that often results in overflow errors and the one time it worked, it took a very long time. How can i search through memory in the same way a program like tsearch or cheatengine would?

[arigity]

cheatengine is open source, you can check and see the exact method they use.

a general method though, is to read a huge chunk of data into a byte array, then search through that using loops

vb is not a particularly fast language to write something in but that should be faster then spamming ReadProcessMemory

[Fenryr]

Well, thanks for the help, but i dont really know how i would go about doing that, od you think you could help me a little more than that?

[Apoc]

If it's slow for you, you coded your methods to do the searching very badly.

I can search all of WoW's address space in under 5ms.

[Fenryr]

well, the only way so far i've been able to even think of is this, any suggestions?

        Do Until value  = "desired value"

           address = address + &h1
           peek("wow", address , value)
        Loop

something similar to that at least(i'll update it when i get back to my computer with vb 2008 installed), i just did that this second, so the real one includes instructions for the byte conversion and all that, but it is extremely slow and most of the time just crashes from an overflow error, can you help me by posting an example apoc, or anyone else?