c# 注册热键功能

using System.Runtime.InteropServices;

//注册热键的api

[DllImport("user32")]

public static extern bool RegisterHotKey(IntPtr hWnd,int id,uint control,Keys vk );

//解除注册热键的api

[DllImport("user32")]
public static extern bool UnregisterHotKey(IntPtr hWnd, int id);

private void Form2_Load1(object sender, System.EventArgs e)
{
            RegisterHotKey(this.Handle,888,2,Keys.A);
            //handle:这个窗体的handle   888:这个热键的标志id    2:crtl鍵   A: a鍵
}

private void Form2_Load1(object sender, System.EventArgs e)
{
             UnregisterHotKey(this.Handle,888);
            //handle:这个窗体的handle   888:上面那个热键的标志id
}

protected override void WndProc(ref Message m)
        {
            switch (m.Msg)
            {
                case 0x0312:    //这个是window消息定义的   注册的热键消息
                    if(m.WParam.ToString().Equals("888"))  //如果是我们注册的那個热键
                        MessageBox.Show("你按了ctrl+a");
                    break;
            }
            base.WndProc (ref m);
        }

None = 0,Alt = 1,crtl= 2,   Shift = 4,Windows = 8

这是热键的定义 alt+crtl是3  直接相加就可以了

如果用sendmessagea这個api  就是

SendMessage(this.Handle,WM_SETHOTKEY,0x45a, 0)

//WM_SETHOTKEY 是 0x32
//0x45a    高字节是contrl键低字节是a b c d   所以5a是z的ascii   4是alt  也就是alt+z