using System;
using System.Runtime.InteropServices;

namespace ExeP
{
 /// <summary>
 /// DeCompress 的摘要说明。
 /// </summary>
 public class DeCompress
 {
  [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
   private struct SHELLEXECUTEINFO
  {
   public int cbSize;
   public uint fMask;
   public IntPtr hwnd;
   public string lpVerb;
   public string lpFile;
   public string lpParameters;
   public string lpDirectory;
   public int nShow;
   public IntPtr hInstApp;
   public int lpIDList;
   public string lpClass;
   public IntPtr hkeyClass;
   public int dwHotKey;
   public IntPtr hIcon;
   public IntPtr hProcess;
  }

  [DllImport("shell32", CharSet=CharSet.Auto)]
  extern static int ShellExecuteEx(ref SHELLEXECUTEINFO lpExecInfo);

  private const int SEE_MASK_INVOKELIST = 0xC;

  private const int SEE_MASK_DOENVSUBST =0x200;
  private const int SEE_MASK_FLAG_DDEWAIT=0x100;
  //0x04000000
  private const int SEE_MASK_NOCLOSEPROCESS=0x40;
  private const int SEE_MASK_NO_CONSOLE=0x8000;

  private const uint INFINITE=0xFFFFFFFF;

  [DllImport("kernel32.dll", SetLastError=true)] static extern int CloseHandle ( int hObject)  ;
  [DllImport("kernel32.dll", SetLastError=true)] static extern int WaitForSingleObject ( int hHandle, uint dwMilliseconds) ;

  string _rarExeFilePathName="";
  public DeCompress(string rarExeFilePathName)
  {
   //
   // TODO: 在此处添加构造函数逻辑
   //
   _rarExeFilePathName=rarExeFilePathName;
  }

  /*
   解压缩 函数
   */
  public bool ExtractRarFile(string sourceRarFilePathName,string targetPath)
  {
   SHELLEXECUTEINFO seInfo = new SHELLEXECUTEINFO();

   seInfo.cbSize = Marshal.SizeOf(seInfo);
   seInfo.fMask =(SEE_MASK_DOENVSUBST | SEE_MASK_FLAG_DDEWAIT | 0x04000000 | SEE_MASK_NOCLOSEPROCESS | SEE_MASK_NO_CONSOLE) ;// SEE_MASK_INVOKELIST;
   seInfo.lpVerb ="open";// "properties";
   seInfo.lpFile = @"c:\Winnt\NOTEPAD.EXE";
   seInfo.nShow=1;
   string param=" E -inul -o+ \"" + sourceRarFilePathName + "\" \"" + targetPath +"\"";
   seInfo.lpParameters=param;

   ShellExecuteEx(ref seInfo);
   
   if(seInfo.hProcess.ToInt32()>0)
   {
    Int32 h=seInfo.hProcess.ToInt32();
    WaitForSingleObject(seInfo.hProcess.ToInt32(),INFINITE);  // #define INFINITE            0xFFFFFFFF  // Infinite timeout
    CloseHandle(seInfo.hProcess.ToInt32());
    return true;
   }
   else
   {
    return false;
   }
  }
 }
}