VC++.进程路径

#include <Psapi.h>
CString DosPathToNt(IN TCHAR *szDosPath)
{
    CString ret;
    try
    {
        TCHAR szDriver[MAX_PATH] = { 0 };
        TCHAR szTemp[3] = { 0 };
        TCHAR szDevName[MAX_PATH] = { 0 };
        INT iTemp = 0;
        if (!szDosPath)
        {
            return ret;
        }
        if (GetLogicalDriveStrings(MAX_PATH * sizeof(TCHAR), szDriver))
        {
            //c : \ \0
            //d : \ \0
            //...
            //\0 \0 \0 \0
            for (DWORD i = 0; szDriver[i]; i += 4)
            {
                //跳过盘符A:  B: 
                if (!lstrcmpi(&(szDriver[i]), _T("A:\\")) || !lstrcmpi(&(szDriver[i]), _T("B:\\")))
                    continue;
                szTemp[0] = szDriver[i];
                szTemp[1] = szDriver[i + 1];
                szTemp[2] = _T('\0');
                if (QueryDosDevice(szTemp, szDevName, MAX_PATH * sizeof(TCHAR))) //查询 Dos 设备名
                {
                    iTemp = lstrlen(szDevName);
                    if (0 == _tcsnicmp(szDosPath, szDevName, lstrlen(szDevName))) //命中
                    {
                        ret = szTemp; //复制驱动器
                        ret += (szDosPath + iTemp); //复制路径
                    }
                }
            }
        }
        else
        {
            ret = szDosPath;  
        }
    }
    catch (...)
    {
        OutputDebugStringA(__FUNCTION__);
    }
    return ret;
}
CString GetProcessPath(IN DWORD dwPid)
{
    CString ret;
    try
    {
        TCHAR szImagePath[MAX_PATH] = { 0 };
        HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, 0, dwPid);
        if (hProcess)
        {
            if (GetProcessImageFileName(hProcess, szImagePath, MAX_PATH * sizeof(TCHAR)))
            {
                ret = DosPathToNt(szImagePath);
            }
            CloseHandle(hProcess);
        }
    }
    catch (...)
    {
        OutputDebugStringA(__FUNCTION__);
    }
    return ret;
}

int main()
{
    CString str = GetProcessPath(GetCurrentProcessId());

    return 0;
}