小編給大家分享一下用微信PC端dll庫(kù)如何實(shí)現(xiàn)截圖，相信大部分人都還不怎么了解，因此分享這篇文章給大家參考一下，希望大家閱讀完這篇文章后大有收獲，下面讓我們一起去了解一下吧！

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ScreenForm.cs代碼:

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)
    {
      //注冊(cè)熱鍵(窗體句柄,熱鍵ID,輔助鍵,實(shí)鍵)  
      try
      {
        Hotkey.Regist(Handle, HotkeyModifiers.MOD_ALT, Keys.F1, ScreenCapture);
      }
      catch (Exception te)
      {
        MessageBox.Show("Alt + A 熱鍵被占用");
      }
    }

    private void Form1_FormClosed(object sender, FormClosedEventArgs e)
    {
      //注消熱鍵(句柄,熱鍵ID)  
      Hotkey.UnRegist(Handle, ScreenCapture);
    }
  }

  public class DLL
  {
    [DllImport("PrScrn.dll", EntryPoint = "PrScrn")]
    public static extern int PrScrn(); //與dll中一致  
  }


  public static class Hotkey
  {
    #region 系統(tǒng)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 keymap =
      new Dictionary();

    /// 

    ///   注冊(cè)快捷鍵
    /// 
    /// 持有快捷鍵窗口的句柄
    /// 組合鍵
    /// 快捷鍵的虛擬鍵碼
    /// 回調(diào)函數(shù)
    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;
    }

    /// 

    ///   注銷(xiāo)快捷鍵
    /// 
    /// 持有快捷鍵窗口的句柄
    /// 回調(diào)函數(shù)
    public static void UnRegist(IntPtr hWnd, HotKeyCallBackHanlder callBack)
    {
      foreach (var var in keymap)
      {
        if (var.Value == callBack)
          UnregisterHotKey(hWnd, var.Key);
      }
    }

    /// 

    ///   快捷鍵消息處理
    /// 
    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
  }
}

運(yùn)行結(jié)果如圖:

以上是用微信PC端dll庫(kù)如何實(shí)現(xiàn)截圖的所有內(nèi)容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內(nèi)容對(duì)大家有所幫助，如果還想學(xué)習(xí)更多知識(shí)，歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道！