DWORD WINAPI GetModuleFileNameEx(
  __in          HANDLE hProcess,
  __in          HMODULE hModule,
  __out         LPTSTR lpFilename,
  __in          DWORD nSize
);

#include <iostream>
#include <windows.h>
#include <TLHELP32.H>

using namespace std;

typedef DWORD (__stdcall* PFGetModuleFileNameEx)(HANDLE hProcess,
                         HMODULE hModule,
                         LPTSTR lpFilename,
                         DWORD nSize);

PFGetModuleFileNameEx GetModuleFileNameEx;

DWORD GetQQProcessId()
{
    HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    
    if (hSnapshot == INVALID_HANDLE_VALUE)
        return -1;
    
    PROCESSENTRY32 pe;
    pe.dwSize = sizeof(pe);
    
    if (Process32First(hSnapshot, &pe))
    {
        do 
        {
            if (lstrcmpi(pe.szExeFile, TEXT("qq.exe")) == 0)
            {
                CloseHandle(hSnapshot);
                return pe.th32ProcessID;
            }
        } while(Process32Next(hSnapshot, &pe));
    }

    CloseHandle(hSnapshot);
    return -1;
}

BOOL GetQQProcessPath(LPSTR pszPath, DWORD dwSize)
{
    DWORD dwProcessId = GetQQProcessId();
    
    if (dwProcessId == -1)
    {
        cout << "can't find qq process id" << endl;
        return FALSE;
    }

    HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, dwProcessId);
    
    if (hProcess == NULL)
    {
        cout << "can't get qq process path" << endl;
        return FALSE;
    }
    
    HMODULE hPsapi = LoadLibrary(TEXT("psapi.dll"));

    if (hPsapi == NULL)
    {
        cout << "LoadLibrary failed " << endl;
        CloseHandle(hProcess);
        return FALSE;
    }

    GetModuleFileNameEx = (PFGetModuleFileNameEx)GetProcAddress(hPsapi, "GetModuleFileNameExA");
    
    if (GetModuleFileNameEx == NULL)
    {
        CloseHandle(hProcess);
        FreeLibrary(hPsapi);
        return FALSE;
    }

    GetModuleFileNameEx(hProcess, NULL, pszPath, dwSize);

    cout << pszPath << endl;

    CloseHandle(hProcess);
    FreeLibrary(hPsapi);
    
    return TRUE;
}

int main(void)
{
    CHAR szPath[MAX_PATH] = { 0 };
    GetQQProcessPath(szPath, MAX_PATH);
    return 0;
}