/*
 * Created by SharpDevelop.
 * User: USECRETARIAT3
 * Date: 1/04/2009
 * Time: 13:53
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Text;

namespace Antalys
{
	/// <summary>
	/// Description of MircMSG.
	/// </summary>
	public class MircMSG : IDisposable
	{
		IntPtr FileMapHandle   = IntPtr.Zero;
		IntPtr FileMap         = IntPtr.Zero;
		
		const int WM_USER      = 0x400;
		const int WM_MCOMMAND  = WM_USER+200;
		const int WM_MEVALUATE = WM_USER+201;
		
		[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
		public static extern IntPtr CreateFileMapping(
			IntPtr hFile,
			IntPtr lpFileMappingAttributes,
			FileMapProtection flProtect,
			uint dwMaximumSizeHigh,
			uint dwMaximumSizeLow,
			[MarshalAs(UnmanagedType.LPTStr)] string lpName);
		
		[Flags]
		public enum FileMapProtection : uint
		{
   			PageReadonly = 0x02,
    		PageReadWrite = 0x04,
    		PageWriteCopy = 0x08,
    		PageExecuteRead = 0x20,
    		PageExecuteReadWrite = 0x40,
    		SectionCommit = 0x8000000,
    		SectionImage = 0x1000000,
    		SectionNoCache = 0x10000000,
    		SectionReserve = 0x4000000,
		}
		
		[DllImport("kernel32.dll", SetLastError = true)]
		static extern IntPtr MapViewOfFile(
			IntPtr hFileMappingObject,
			FileMapAccess dwDesiredAccess,
			uint dwFileOffsetHigh,
			uint dwFileOffsetLow,
			uint dwNumberOfBytesToMap);
		
		[Flags]
		public enum FileMapAccess : uint
		{
			FileMapCopy = 0x0001,
			FileMapWrite = 0x0002,
			FileMapRead = 0x0004,
			FileMapAllAccess = 0x001f,
			fileMapExecute = 0x0020,
		}
		
		[DllImport("kernel32.dll", SetLastError=true)]
		static extern bool UnmapViewOfFile(IntPtr lpBaseAddress);
				
		[DllImport("kernel32.dll", SetLastError=true)]
		[return: MarshalAs(UnmanagedType.Bool)]
		static extern bool CloseHandle(IntPtr hObject);
		
		[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
		static extern bool SendMessage(IntPtr hWnd, Int32 Msg, int wParam, int lParam);
		
				
		public IntPtr GetMircHandle(){
			Process p = Process.GetProcessesByName("mirc")[0];
			return p.Handle;
		}
		
		public MircMSG(){
			FileMapHandle = CreateFileMapping(new IntPtr(-1),IntPtr.Zero,FileMapProtection.PageReadWrite,0,1024,"mirc");
			FileMap = MapViewOfFile(FileMapHandle, FileMapAccess.FileMapWrite,0,0,1024);
		}
		
		public void Dispose(){
			if (!UnmapViewOfFile(FileMap)) throw new Exception(Marshal.GetLastWin32Error().ToString());
			if (!CloseHandle(FileMapHandle)) throw new Exception(Marshal.GetLastWin32Error().ToString());
		}
		
		public bool SendMircMessage(string command){
			Marshal.Copy(command.ToCharArray(),0,FileMap,command.Length);
			return SendMessage(GetMircHandle(),WM_MCOMMAND,1,0);
		}
	}
}