Permission denied while taking a snapshot of running process using CreateToolhelp32Snapshot() - c++

Question

Today I was requested to turn my console app(eg:App.exe) into a service, just googled and found nssm then used its effective commands to turn my APP.exe to a service,My next job is to monitor the running process(APP.exe) and if its size exceeds >30MB restart it that's all.What I've learned previously from nssm is when I kill the APP.exe nssm automatically restart it, So now I only need to code for only monitoring and killing the APP.exe when it exceeds 30MB,finally I've created an app that does monitoring There comes the problem, In the monitoring app I have been using CreateToolhelp32Snapshot() to take a snapshot of all running processes and try to find my APP.exe by its name then get it's size by pmc.WorkingSetSize, Yet When I ran my monitoring app it can't find the APP.EXE though i see it exist in the task manager I even ran it as an administrator yet it remains the same can any one helpme rid of this issue.
The error I am getting while taking a snapshot is permission denied.
please see my code below:
int main()
{
LOG mon;
PROCESSENTRY32 pe32 = {0};
HANDLE hSnap;
HANDLE hprocess;
PROCESS_MEMORY_COUNTERS pmc;
int iDone;
int iTime = 60;
bool bProcessFound;
while(true) // go forever
{
cout<<"adjfhaljkehdfhwoefjiej";
hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
pe32.dwSize = sizeof(PROCESSENTRY32);
Process32First(hSnap,&pe32); // Can throw away, never an actual app
bProcessFound = false; //init values
iDone = 1;
while(iDone) // go until out of Processes
{
iDone = Process32Next(hSnap,&pe32);
if (strcmp(pe32.szExeFile,"APP.exe") == 0) // Did we find our process?
{
DWORD processID = pe32.th32ProcessID;
hprocess= OpenProcess( PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ,
FALSE, processID );
if (GetProcessMemoryInfo( hprocess, &pmc, sizeof(pmc)))
{
size_t procsize=pmc.WorkingSetSize;
cout<<procsize;
if(procsize>30MB)--mylogic
{
hprocess=OpenProcess(PROCESS_TERMINATE,0, processID);
TerminateProcess (hprocess, 0);
mon.RestartLog("Server Closed due to large size");
}
}
bProcessFound = true;
iDone = 0;
}
}
if(!bProcessFound) .
{
mon.RestartLog("Server Down ");
}
Sleep(iTime*50); // delay x amount of seconds.
}
return 0;
}

Answer 1

Run the above said monitor app as a system process. i.e, make it as a service.