鳕鱼天空

const int WM_NCHITTEST = 0x0084;
const int HTLEFT = 10;
const int HTRIGHT = 11;
const int HTTOP = 12;
const int HTTOPLEFT = 13;
const int HTTOPRIGHT = 14;
const int HTBOTTOM = 15;
const int HTBOTTOMLEFT = 0x10;
const int HTBOTTOMRIGHT = 17;
protected override void WndProc(ref Message m)
{
    base.WndProc(ref m);
    switch (m.Msg)
    {
case WM_NCHITTEST:
    Point vPoint = new Point((int)m.LParam & 0xFFFF,
(int)m.LParam >> 16 & 0xFFFF);
    vPoint = PointToClient(vPoint);
    if (vPoint.X <= 5)
if (vPoint.Y <= 5)
    m.Result = (IntPtr)HTTOPLEFT;
else if (vPoint.Y >= ClientSize.Height - 5)
    m.Result = (IntPtr)HTBOTTOMLEFT;
else m.Result = (IntPtr)HTLEFT;
    else if (vPoint.X >= ClientSize.Width - 5)
if (vPoint.Y <= 5)
    m.Result = (IntPtr)HTTOPRIGHT;
else if (vPoint.Y >= ClientSize.Height - 5)
    m.Result = (IntPtr)HTBOTTOMRIGHT;
else m.Result = (IntPtr)HTRIGHT;
    else if (vPoint.Y <= 5)
m.Result = (IntPtr)HTTOP;
    else if (vPoint.Y >= ClientSize.Height - 5)
m.Result = (IntPtr)HTBOTTOM;
    break;
    }
}

1、窗体热键

首先要设置主窗体KeyPreview为true,可直接在属性中进行设置，
或者在窗体加载中设置： this.KeyPreview = true;
然后添加窗体KeyDown事件，如下：

private void FrmMain_KeyDown(object sender, KeyEventArgs e)  
{  
    if (e.Alt && e.Shift && e.Control && e.KeyCode == Keys.S)  
    {  
 MessageBox.Show("我按了Control +Shift +Alt +S");  
    }  
}  

2、全局热键设置

定义API函数 》 注册热键 》 卸载热键

我这里定义了AppHotKey类，全部代码如下：

public class AppHotKey  
{  
        [DllImport("kernel32.dll")]  
        public static extern uint GetLastError();  
        //如果函数执行成功，返回值不为0。  
        //如果函数执行失败，返回值为0。要得到扩展错误信息，调用GetLastError。  
        [DllImport("user32.dll", SetLastError = true)]  
        public static extern bool RegisterHotKey(  
            IntPtr hWnd,                //要定义热键的窗口的句柄  
            int id,                     //定义热键ID（不能与其它ID重复）            
            KeyModifiers fsModifiers,   //标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效  
            Keys vk                     //定义热键的内容  
            );  
  
        [DllImport("user32.dll", SetLastError = true)]  
        public static extern bool UnregisterHotKey(  
            IntPtr hWnd,                //要取消热键的窗口的句柄  
            int id                      //要取消热键的ID  
            );  
  
        //定义了辅助键的名称（将数字转变为字符以便于记忆，也可去除此枚举而直接使用数值）  
        [Flags()]  
        public enum KeyModifiers  
        {  
            None = 0,  
            Alt = 1,  
            Ctrl = 2,  
            Shift = 4,  
            WindowsKey = 8  
        }  
        /// <summary>  
        /// 注册热键  
        /// </summary>  
        /// <param name="hwnd">窗口句柄</param>  
        /// <param name="hotKey_id">热键ID</param>  
        /// <param name="keyModifiers">组合键</param>  
        /// <param name="key">热键</param>  
        public static void RegKey(IntPtr hwnd, int hotKey_id, KeyModifiers keyModifiers, Keys key)  
        {  
            try  
            {  
                if (!RegisterHotKey(hwnd, hotKey_id, keyModifiers, key))  
                {  
                    if (Marshal.GetLastWin32Error() == 1409) { MessageBox.Show("热键被占用 ！"); }  
                    else  
                    {  
                        MessageBox.Show("注册热键失败！");  
                    }  
                }  
            }  
            catch (Exception) { }  
        }  
        /// <summary>  
        /// 注销热键  
        /// </summary>  
        /// <param name="hwnd">窗口句柄</param>  
        /// <param name="hotKey_id">热键ID</param>  
        public static void UnRegKey(IntPtr hwnd, int hotKey_id)  
        {  
            //注销Id号为hotKey_id的热键设定  
            UnregisterHotKey(hwnd, hotKey_id);  
        }  
}  

重写窗体的WndProc函数，在窗口创建的时候注册热键，窗口销毁时销毁热键，代码如下：

private const int WM_HOTKEY = 0x312; //窗口消息-热键  
private const int WM_CREATE = 0x1; //窗口消息-创建  
private const int WM_DESTROY = 0x2; //窗口消息-销毁  
private const int Space = 0x3572; //热键ID  
protected override void WndProc(ref Message m)  
{  
    base.WndProc(ref m);  
    switch (m.Msg)  
    {  
 case WM_HOTKEY: //窗口消息-热键ID  
     switch (m.WParam.ToInt32())  
     {  
  case Space: //热键ID  
      MessageBox.Show("我按了Control +Shift +Alt +S");  
      break;  
  default:  
      break;  
     }  
     break;  
 case WM_CREATE: //窗口消息-创建  
     AppHotKey.RegKey(Handle, Space, AppHotKey.KeyModifiers.Ctrl | AppHotKey.KeyModifiers.Shift | AppHotKey.KeyModifiers.Alt, Keys.S);  
     break;  
 case WM_DESTROY: //窗口消息-销毁  
     AppHotKey.UnRegKey(Handle, Space); //销毁热键  
     break;  
 default:  
     break;  
    }  
}  

using System.Reflection  
  
Private void SetButton(Button button)  
{  
  MethodInfo methodinfo = button.GetType().GetMethod("SetStyle",BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.InvokeMethod);  
  methodinfo.Invoke(button,BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.InvokeMethod,null,new object[] {ControlStyles.Selectable,false},Application.CurrentCulture);  
}  

效果：

==============================================

点击后不得到焦点且不影响当前焦点所在位置，类似系统计算器中按钮的效果。

可以实现无焦点的按钮、复选框、单选框、进度条等控件。

==============================================

转载请注明来源。

来源：http://blog.csdn.net/all77889900/article/details/5832415