C#调用已经安装的程序打开文件

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Runtime.InteropServices;namespace ConsoleApplication1{    class Program    {        [DllImport("kernel32.dll")]          public static extern int WinExec(string exeName, int operType);//添加申明调用的是系统提供的函数        static void Main(string[] args)        {           // WinExec(@"C:\Program Files\Microsoft Visual Studio\Common\MSDev98\Bin\MSDEV.EXE",3);//打开vc++6.0            System.Diagnostics.Process.Start(@"C:\Program Files\Microsoft Visual Studio\Common\MSDev98\Bin\MSDEV.EXE", @"D:liu.c");//使用vc++6.0打开liu.c文件        }    }}