WinForm 如何注册热键？

 Q:WinForm 如何注册热键？

A:

using    System; 
using    System.Collections.Generic; 
using    System.ComponentModel; 
using    System.Data; 
using    System.Drawing; 
using    System.Text; 
using    System.Windows.Forms; 
using    System.DirectoryServices; 
using    System.Runtime.InteropServices; 
namespace    test 
... { 
         public     partial     class    Form1   :   Form 
         ... { 
                 class    HotKey 
                 ... { 
                         // 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  
                        }  
                }  


                 public    Form1() 
                 ... { 
                        InitializeComponent(); 
                        HotKey.RegisterHotKey( this .Handle,    100 ,    0 ,   Keys.F1); 
                        
                }  

                 protected     override     void    WndProc( ref    Message   m) 
                 ... { 
                         const     int    WM_HOTKEY    =     0x0312 ; 
                         // 按快捷键   
                         switch    (m.Msg) 
                         ... { 
                                 case    WM_HOTKEY: 
                                         switch    (m.WParam.ToInt32()) 
                                         ... { 
                                                 case     100 : 
                                                        MessageBox.Show(  " Press   F1  " ); 
                                                         break ; 
                                        }  
                                         break ; 
                        }  
                         base .WndProc( ref    m); 
                }  

                

        }  
}