用微信PC端dll库实现截图的实例代码-木庄网络博客

本文摘自PHP中文网，作者零下一度，侵删。

这篇文章主要为大家详细介绍了使用微信PC端的截图dll库实现微信截图功能，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文实例为大家分享了截图dll库实现微信截图功能，供大家参考，具体内容如下

ScreenForm.cs代码:

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Windows.Forms;
 
namespace screenT
{
  public partial class ScreenForm : Form
  {
    public ScreenForm()
    {
      InitializeComponent();
    }
 
 
    private void ScreenCapture()
    {
      DLL.PrScrn();
    }
 
    protected override void WndProc(ref Message m)
    {
      base.WndProc(ref m);
      Hotkey.ProcessHotKey(m);
    }
 
    private void button1_Click(object sender, EventArgs e)
    {
      DLL.PrScrn();
    }
 
    private void Form1_Load(object sender, EventArgs e)
    {
      //注册热键(窗体句柄,热键ID,辅助键,实键)  
      try
      {
        Hotkey.Regist(Handle, HotkeyModifiers.MOD_ALT, Keys.F1, ScreenCapture);
      }
      catch (Exception te)
      {
        MessageBox.Show("Alt + A 热键被占用");
      }
    }
 
    private void Form1_FormClosed(object sender, FormClosedEventArgs e)
    {
      //注消热键(句柄,热键ID)  
      Hotkey.UnRegist(Handle, ScreenCapture);
    }
  }
 
  public class DLL
  {
    [DllImport("PrScrn.dll", EntryPoint = "PrScrn")]
    public static extern int PrScrn(); //与dll中一致  
  }
 
 
  public static class Hotkey
  {
    #region 系统api
 
    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool RegisterHotKey(IntPtr hWnd, int id, HotkeyModifiers fsModifiers, Keys vk);
 
    [DllImport("user32.dll")]
    private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
 
    #endregion
 
    public delegate void HotKeyCallBackHanlder();
 
    private const int WM_HOTKEY = 0x312;
    private static int keyid = 10;
 
    private static readonly Dictionary<int, HotKeyCallBackHanlder> keymap =
      new Dictionary<int, HotKeyCallBackHanlder>();
 
    /// <summary>
    ///   注册快捷键
    /// </summary>
    /// <param name="hWnd">持有快捷键窗口的句柄</param>
    /// <param name="fsModifiers">组合键</param>
    /// <param name="vk">快捷键的虚拟键码</param>
    /// <param name="callBack">回调函数</param>
    public static void Regist(IntPtr hWnd, HotkeyModifiers fsModifiers, Keys vk, HotKeyCallBackHanlder callBack)
    {
      int id = keyid++;
      if (!RegisterHotKey(hWnd, id, fsModifiers, vk))
        throw new Exception("regist hotkey fail.");
      keymap[id] = callBack;
    }
 
    /// <summary>
    ///   注销快捷键
    /// </summary>
    /// <param name="hWnd">持有快捷键窗口的句柄</param>
    /// <param name="callBack">回调函数</param>
    public static void UnRegist(IntPtr hWnd, HotKeyCallBackHanlder callBack)
    {
      foreach (var var in keymap)
      {
        if (var.Value == callBack)
          UnregisterHotKey(hWnd, var.Key);
      }
    }
 
    /// <summary>
    ///   快捷键消息处理
    /// </summary>
    public static void ProcessHotKey(Message m)
    {
      if (m.Msg == WM_HOTKEY)
      {
        int id = m.WParam.ToInt32();
        HotKeyCallBackHanlder callback;
        if (keymap.TryGetValue(id, out callback))
        {
          callback();
        }
      }
    }
  }
 
  public enum HotkeyModifiers
  {
    MOD_ALT = 0x1,
    MOD_CONTROL = 0x2,
    MOD_SHIFT = 0x4,
    MOD_WIN = 0x8
  }
}