[導讀]這篇文章主要為大家詳細介紹了使用微信PC端的截圖dll庫實作微信截圖功能
本文執行個體為大家分享了截圖dll庫實作微信截圖功能 ，供大家參考，具體内容如下
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)
{
//注冊熱鍵(窗體句柄,熱鍵ID,輔助鍵,實鍵)
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中一緻
}
public static class Hotkey
{
#region 系統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();
///
/// 注冊快捷鍵
///
/// 持有快捷鍵視窗的句柄
/// 組合鍵
/// 快捷鍵的虛拟鍵碼
/// 回調函數
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;
}
///
/// 登出快捷鍵
///
/// 持有快捷鍵視窗的句柄
/// 回調函數
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
}
}