60 lines
2.5 KiB
C#
60 lines
2.5 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Diagnostics;
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namespace Sheng.Winform.Controls.Win32
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{
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public static class WinMessage
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{
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/// <summary>
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/// 发送消息，只能传递一个自定义的消息ID和消息字符串，想传一个结构，但没成功
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/// </summary>
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/// <param name="destProcessName">目标进程名称，如果有多个，则给每个都发送</param>
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/// <param name="msgID">自定义数据，可以通过这个来决定如何解析下面的strMsg</param>
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/// <param name="strMsg">传递的消息，是一个字符串</param>
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public static void SendMessage(string destProcessName, int msgID, string strMsg)
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{
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if (strMsg == null)
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return;
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//按进程名称查找，同名称的进程可能有许多，所以返回的是一个数组
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Process[] foundProcess = Process.GetProcessesByName(destProcessName);
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foreach (Process p in foundProcess)
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{
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int toWindowHandler = p.MainWindowHandle.ToInt32();
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if (toWindowHandler != 0)
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{
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User32.CopyDataStruct cds;
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cds.dwData = (IntPtr)msgID; //这里可以传入一些自定义的数据，但只能是4字节整数
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cds.lpData = strMsg; //消息字符串
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cds.cbData = System.Text.Encoding.Default.GetBytes(strMsg).Length + 1; //注意，这里的长度是按字节来算的
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//发送方的窗口的句柄, 由于本系统中的接收方不关心是该消息是从哪个窗口发出的，所以就直接填0了
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int fromWindowHandler = 0;
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User32.SendMessage(toWindowHandler, User32.WM_COPYDATA, fromWindowHandler, ref cds);
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}
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}
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}
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/// <summary>
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/// 接收消息，得到消息字符串
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/// </summary>
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/// <param name="m">System.Windows.Forms.Message m</param>
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/// <returns>接收到的消息字符串</returns>
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public static string ReceiveMessage(ref System.Windows.Forms.Message m)
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{
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if (m.Msg == User32.WM_COPYDATA)
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{
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User32.CopyDataStruct cds = (User32.CopyDataStruct)m.GetLParam(typeof(User32.CopyDataStruct));
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return cds.lpData;
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}
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else
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{
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return String.Empty;
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}
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}
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}
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}
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