Cheat Engine

Freiza · Posted: Mon Apr 11, 2011 6:28 am Post subject: VirtualQueryEx problem

Code:

memblock* createscan(DWORD pid)
{

memblock *m= NULL;
HANDLE hproc= OpenProcess(PROCESS_ALL_ACCESS,FALSE,pid);
MEMORY_BASIC_INFORMATION meminfo;
unsigned char *addr=0;

if(hproc)
{
   while(1)
   {
      if(VirtualQueryEx(hproc,addr,&meminfo,sizeof(meminfo))==0)
      {
         break;
      }

What is wrong in this code.. it always exits while loop. ie VirtualQueryEx always returns 0.

Cheat Engine User · Posted: Mon Apr 11, 2011 8:23 am Post subject:

Call GetLastError, what do you get?

Freiza · Posted: Mon Apr 11, 2011 10:59 am Post subject:

Error Code : 87
ERROR_INVALID_PARAMETER
but i think all my parameter are fine..

Cheat Engine User · Posted: Mon Apr 11, 2011 11:11 am Post subject:

Freiza · Posted: Mon Apr 11, 2011 11:16 am Post subject:

yes.. For pid
Dword pid;
cin>>pid;

pid== active notepad (collected from task manager ) currently 6044.

i think there is some problem in addr ..

my complete code is long enuff to post..(though not advance). else i would have posted here.

Cheat Engine User · Posted: Mon Apr 11, 2011 11:17 am Post subject:

Freiza · Posted: Mon Apr 11, 2011 11:23 am Post subject:

on GetLastError at OpenProcess = 0
hproc = 28;

Cheat Engine User · Posted: Mon Apr 11, 2011 11:50 am Post subject:

Freiza · Posted: Mon Apr 11, 2011 11:56 am Post subject:

I am using windows 7 .. can this be the reason? ( i mean administrator priviledge)

and already tried using LPCVOID addr.. but didn't worked.

atom0s · Posted: Mon Apr 11, 2011 2:52 pm Post subject:

Don't use PROCESS_ALL_ACCESS, specify what flags you need.
Call memset/ZeroMemory on your memory structure to initialize it for safety.
Use GetSystemInfo to get the page sizes of the system and the minimum address location too.