Question

Someone can say if I’m using it right ?

LPTSTR nameProc = "";
...
GetProcessImageFileName( hProcess, nameProc, 50 );

printf("name process : %s\n", nameProc);

I’m not used with the win32 types,
the 2nd argument of the GetProcessImageFileName requires a LPTSTR typedef and the third one takes a DWORD variable.
if not the method maybe i’m not printing the value of nameProc the right way ? (it prints an empty string by the way)

thanks in advance.

(please try to avoid leading me to some win32 api documents, i have no intention to learn about it, i just need to trace the usage memory of one process, therefore I won’t no longer deal with win types)

EDIT (updated code):

void printMemoryInfo( DWORD processID ) {

    HANDLE hProcess;
    TCHAR nameProc[MAX_PATH];

    printf("\nProcess ID: %u\n", processID);

    hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processID );

    if (hProcess == NULL) return;

    if (GetProcessImageFileName( hProcess, nameProc, sizeof(nameProc)/sizeof(*nameProc) )==0)
        printf("error\n");

    else printf("%s\n", nameProc);
}

int main (void) {

    DWORD aProcesses[1024], cbNeeded, cProcesses;
    unsigned int i;

    if (!EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded )) {

        return 1;
    }

    cProcesses = cbNeeded/sizeof(DWORD);

    for (i=0; i < cProcesses; i++) {

    printMemoryInfo( aProcesses[i] );
    }

    return 0;
}

Answer 1

nameProc needs to be a mutable buffer as it is an output parameter, at the moment it will probably just crash. Change this:

LPTSTR nameProc = "";

to this:

TCHAR nameProc[MAX_PATH];

Also pass MAX_PATH where you are passing 50 at the moment.