C++ Windows - How to get process path from its PID

Question

Hi

How i can get process path from it's PID in C++ (Windows).

I search this in Google, MSDN, and stackoverflow.com, but I don't find this.

Answer 1

Call OpenProcess to get a handle to the process associated with your PID. Once you have a handle to the process, call GetModuleFileNameEx to get its fully-qualified path. Don't forget to call CloseHandle when you're finished using the process handle.

Here's a sample program that performs the required calls:

#include <windows.h>
#include <psapi.h> // For access to GetModuleFileNameEx
#include <tchar.h>

#include <iostream>

using namespace std;

#ifdef _UNICODE
  #define tcout wcout
  #define tcerr wcerr
#else
  #define tcout cout
  #define tcerr cerr
#endif

int _tmain(int argc, TCHAR * argv[])
{
  HANDLE processHandle = NULL;
  TCHAR filename[MAX_PATH];

  processHandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, 1234);
  if (processHandle != NULL) {
    if (GetModuleFileNameEx(processHandle, NULL, filename, sizeof(filename)) == 0) {
      tcerr << "Failed to get module filename." << endl;
    } else {
      tcout << "Module filename is: " << filename << endl;
    }
    CloseHandle(processHandle);
  } else {
    tcerr << "Failed to open process." << endl;
  }

  return 0;
}