using UnityEngine;
using System.Collections;
using System.Runtime.InteropServices;
using System;

namespace System.IO
{
	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
	public class OpenFileName
	{
		public int structSize = 0;
		public IntPtr dlgOwner = IntPtr.Zero;
		public IntPtr instance = IntPtr.Zero;
		public String filter = null;
		public String customFilter = null;
		public int maxCustFilter = 0;
		public int filterIndex = 0;
		public String file = null;
		public int maxFile = 0;
		public String fileTitle = null;
		public int maxFileTitle = 0;
		public String initialDir = null;
		public String title = null;
		public int flags = 0;
		public short fileOffset = 0;
		public short fileExtension = 0;
		public String defExt = null;
		public IntPtr custData = IntPtr.Zero;
		public IntPtr hook = IntPtr.Zero;
		public String templateName = null;
		public IntPtr reservedPtr = IntPtr.Zero;
		public int reservedInt = 0;
		public int flagsEx = 0;
	}
	public class LocalDialog
	{
		//链接指定系统函数       打开文件对话框
		[DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
		public static extern bool GetOpenFileName([In, Out] OpenFileName ofn);
		public static bool GetOFN([In, Out] OpenFileName ofn)
		{
			return GetOpenFileName(ofn);
		}

		//链接指定系统函数        另存为对话框
		[DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
		public static extern bool GetSaveFileName([In, Out] OpenFileName ofn);
		public static bool GetSFN([In,Out] OpenFileName ofn)
		{
			return GetSaveFileName(ofn); 
		}
	}
}