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

出处 https://stackoverflow.com/questions/1933113/c-windows-how-to-get-process-path-from-its-pid

注意质疑（我也没试过）：

• 1

  most of modules turn to a failure in getting file path :( – jondinham Aug 29 '11 at 4:20

• 1

  Does it work when called from a 32bit environemet to get PID of a 64bit process ? I face problem and had to use QueryFullProcessImageName instead of GetModuleFileNameEx – philippe lhardy Nov 13 '14 at 17:55

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 (replace 1234 with your PID):

#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_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, );
  if (processHandle != NULL) {
    if (GetModuleFileNameEx(processHandle, NULL, filename, MAX_PATH) == ) {
      tcerr << "Failed to get module filename." << endl;
    } else {
      tcout << "Module filename is: " << filename << endl;
    }
    CloseHandle(processHandle);
  } else {
    tcerr << "Failed to open process." << endl;
  }

  return ;
}