以一個form程序為例

public class form1 : form

{
            private void form1_load(object sender, system.eventargs e)
            {
                        sethotkey(false, false, false, true, keys.right, 100); // 設置多個熱鍵
                        sethotkey(false, false, false, true, keys.space, 101);
                        sethotkey(false, false, false, true, keys.up, 102);
                        sethotkey(false, false, false, true, keys.down, 103);
            }
            
            private bool key_ctrl = false;
            private bool key_shift = false;
            private bool key_alt = false;
            private bool key_windows = false;
            private keys   key_other;

            public void sethotkey(bool bctrl,bool bshift,bool balt,bool  bwindows,keys nowkey,int keyid)
            {
                  try
                  {
                        this.key_alt = balt;
                        this.key_ctrl = bctrl;
                        this.key_shift = bshift;
                        this.key_windows = bwindows;
                        this.key_other = nowkey;
           
                        winhotkey.keymodifiers modifier = winhotkey.keymodifiers.none;
           
                        if( this.key_ctrl )
                              modifier |= winhotkey.keymodifiers.control;
                        if(this.key_alt )
                              modifier |= winhotkey.keymodifiers.alt;
                        if(this.key_shift)
                              modifier |= winhotkey.keymodifiers.shift;
                        if(this.key_windows)
                              modifier |= winhotkey.keymodifiers.windows;
           
                        winhotkey.registerhotkey(handle,keyid,modifier,nowkey);
                  }
                  catch
                  {
                        messagebox.show ("快捷鍵定義錯誤！");
                  }
            }
           
            protected override void wndproc(ref message msg )
            {
                  const int wm_hotkey =  0x0312; // 熱鍵消息

                  if (msg.msg != wm_hotkey)
                  {
                        base.wndproc(ref msg);
                  }
                  else
                  {
                                  //激活熱鍵,在此可以添加處理程序
                                  if (100 == (int)msg.wparam)
                                  {
                                              //dosomething
                                  }
                                  else if (101 == (int)msg.wparam)
                                  {
                                              //dosomething
                                  }
                                  else if (102 == (int)msg.wparam)
                                  {
                                              //dosomething
                                  }
                                  else
                                  {
                                              //dosomething
                                  }
                  }
           }

            private void form1_closing(object sender, system.componentmodel.canceleventargs e)
            {
                winhotkey.unregisterhotkey(handle, 100);      // 注銷熱鍵
                winhotkey.unregisterhotkey(handle, 101);      // 注銷熱鍵
                winhotkey.unregisterhotkey(handle, 102);      // 注銷熱鍵
                winhotkey.unregisterhotkey(handle, 103);      // 注銷熱鍵
            }

public class winhotkey
{
            public winhotkey()
            {
           
            }

            [dllimport("user32.dll",setlasterror=true)]
            public static extern bool registerhotkey(
                  intptr hwnd,
                  int id,
                  keymodifiers fsmodifiers,
                  keys vk
                  );

            [dllimport("user32.dll",setlasterror=true)]
            public static extern bool unregisterhotkey(
                  intptr hwnd,
                  int id
                  );

            [flags()]
            public enum keymodifiers
            {
                  none = 0,
                  alt = 1,
                  control =2,
                  shift = 4,
                  windows = 8
            }

}

這樣就完成了熱鍵的定義