PowerShell实现查询打开某个文件的默认应用程序

$Source = @" using System;using System.Text;using System.Runtime.InteropServices;public class Win32API  {    [DllImport("shell32.dll", EntryPoint="FindExecutable")]     public static extern long FindExecutableA(string lpFile, string lpDirectory, StringBuilder lpResult);     public static string FindExecutable(string pv_strFilename)    {      StringBuilder objResultBuffer = new StringBuilder(1024);      long lngResult = 0;       lngResult = FindExecutableA(pv_strFilename, string.Empty, objResultBuffer);       if(lngResult >= 32)      {        return objResultBuffer.ToString();      }       return string.Format("Error: ({0})", lngResult);    }  } "@ Add-Type -TypeDefinition $Source -ErrorAction SilentlyContinue $FullName = 'c:/Windows/windowsupdate.log'$Executable = [Win32API]::FindExecutable($FullName)   "$FullName will be launched by $Executable"