using System;
using System.Runtime.InteropServices;

namespace EC.AutoWeightServer.SDK
{
	public class Win32API
	{
		[DllImport("User32.dll", EntryPoint = "FindWindow")]
		public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

		[DllImport("User32.dll", EntryPoint = "FindWindowEx")]
		public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpClassName, string lpWindowName);

		/// <summary>
		/// 自定义的结构
		/// </summary>
		public struct My_lParam
		{
			public int i;
			public string s;
		}

		/// <summary>
		/// 使用COPYDATASTRUCT来传递字符串
		/// </summary>
		[StructLayout(LayoutKind.Sequential)]
		public struct COPYDATASTRUCT
		{
			public IntPtr dwData;
			public int cbData;

			[MarshalAs(UnmanagedType.LPStr)]
			public string lpData;
		}

		//消息发送API
		[DllImport("User32.dll", EntryPoint = "SendMessage")]
		public static extern int SendMessage(
			IntPtr hWnd,        // 信息发往的窗口的句柄
		   int Msg,            // 消息ID
			int wParam,         // 参数1
			int lParam          //参数2
		);

		//消息发送API
		[DllImport("User32.dll", EntryPoint = "SendMessage")]
		public static extern int SendMessage(
			IntPtr hWnd,        // 信息发往的窗口的句柄
		   int Msg,            // 消息ID
			int wParam,         // 参数1
			ref My_lParam lParam //参数2
		);

		//消息发送API
		[DllImport("User32.dll", EntryPoint = "SendMessage")]
		public static extern int SendMessage(
			IntPtr hWnd,        // 信息发往的窗口的句柄
		   int Msg,            // 消息ID
			int wParam,         // 参数1
			ref COPYDATASTRUCT lParam  //参数2
		);

		//消息发送API
		[DllImport("User32.dll", EntryPoint = "PostMessage")]
		public static extern int PostMessage(
			IntPtr hWnd,        // 信息发往的窗口的句柄
		   int Msg,            // 消息ID
			int wParam,         // 参数1
			int lParam            // 参数2
		);

		//消息发送API
		[DllImport("User32.dll", EntryPoint = "PostMessage")]
		public static extern int PostMessage(
			IntPtr hWnd,        // 信息发往的窗口的句柄
		   int Msg,            // 消息ID
			int wParam,         // 参数1
			ref My_lParam lParam //参数2
		);

		//异步消息发送API
		[DllImport("User32.dll", EntryPoint = "PostMessage")]
		public static extern int PostMessage(
			IntPtr hWnd,        // 信息发往的窗口的句柄
		   int Msg,            // 消息ID
			int wParam,         // 参数1
			ref COPYDATASTRUCT lParam  // 参数2
		);
	}
}