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Use the WeChat computer screenshot dll library to implement the WeChat screenshot function
Use the WeChat computer screenshot dll library to implement the WeChat screenshot function
Aug 08, 2017 pm 12:02 PM
This article mainly introduces in detail the use of WeChat PC screenshot dll library to implement the WeChat screenshot function. It has a certain reference value. Interested friends can refer to it.
The examples in this article are shared with everyone. The screenshot dll library is used to implement the WeChat screenshot function for your reference. The specific content is as follows
ScreenForm.cs code:
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<int, HotKeyCallBackHanlder> keymap =
new Dictionary<int, HotKeyCallBackHanlder>();
/// <summary>
/// 注冊(cè)快捷鍵
/// </summary>
/// <param name="hWnd">持有快捷鍵窗口的句柄</param>
/// <param name="fsModifiers">組合鍵</param>
/// <param name="vk">快捷鍵的虛擬鍵碼</param>
/// <param name="callBack">回調(diào)函數(shù)</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>
/// 注銷快捷鍵
/// </summary>
/// <param name="hWnd">持有快捷鍵窗口的句柄</param>
/// <param name="callBack">回調(diào)函數(shù)</param>
public static void UnRegist(IntPtr hWnd, HotKeyCallBackHanlder callBack)
{
foreach (var var in keymap)
{
if (var.Value == callBack)
UnregisterHotKey(hWnd, var.Key);
}
}
/// <summary>
/// 快捷鍵消息處理
/// </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
}
}
The running result is as shown:
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