C# 监控粘贴板、总在最前代码

监控粘贴板

using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace AutomaticCopy
{
public partial class Form1 : Form
{
#region Definitions
/**定义热键使用*/

private const int WM_DRAWCLIPBOARD = 0x308;
private const int WM_CHANGECBCHAIN = 0x30D;
private IntPtr nextClipHwnd;

//API declarations...
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static public extern IntPtr SetClipboardViewer(IntPtr hWndNewViewer);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static public extern bool ChangeClipboardChain(IntPtr HWnd, IntPtr HWndNext);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern int SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);
#endregion

public Form1()
{
InitializeComponent();
}
//重写wndproc方法  定义热键使用
protected override void WndProc(ref Message m)//监视Windows消息
{
switch (m.Msg)
{
case WM_DRAWCLIPBOARD:
//将WM_DRAWCLIPBOARD消息传递到下一个观察链中的窗口
SendMessage(nextClipHwnd, m.Msg, m.WParam, m.LParam);

IDataObject data = Clipboard.GetDataObject();
if (data.GetDataPresent(DataFormats.Text) | data.GetDataPresent(DataFormats.OemText))
{
this.label1.Text = (String)data.GetData(DataFormats.Text);
}
break;

default:
base.WndProc(ref m);
break;
}

}

private void Form1_Load(object sender, EventArgs e)
{
nextClipHwnd = SetClipboardViewer(this.Handle);
}

private void FrmMain_FormClosed(object sender, FormClosedEventArgs e)
{
//从观察链中删除本观察窗口
ChangeClipboardChain(this.Handle, nextClipHwnd);

//将WM_DRAWCLIPBOARD消息传递到下一个观察链中的窗口
SendMessage(nextClipHwnd, WM_CHANGECBCHAIN, this.Handle, nextClipHwnd);
}
}
}

总在最前

public Form1()
{
InitializeComponent();
//    timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
//  this.TopMost = false;
//  this.BringToFront();
this.TopMost = true;
}