1   if FindAtom('ZWXhotKey')=0 then
2   begin
3     aatom:=GlobalAddAtom('ZWXhotKey');
4   end;
5   if RegisterHotKey(Handle,aatom,MOD_ALT,$41) then
6   begin
7     MessageBox(Handle,'按alt+a','提示',MB_OK);
8   end;

1     procedure hotkey(var msg:TMessage);message WM_HOTKEY;//定义全局热键消息事件
2   //procedure hotkey2(var msg:TWMHotKey);message WM_HOTKEY;//同上

 1 procedure TForm2.hotkey(var msg: TMessage);
 2 begin
 3   if TWMHotKey(msg).HotKey=aatom then
 4   begin
 5     //ShowMessage('s');
 6   end;
 7   if (msg.LParamHi=$41) and (msg.LParamLo=MOD_ALT) then
 8   begin
       //處理事情
13   end;
14 end;

1 procedure TForm2.FormClose(Sender: TObject; var Action: TCloseAction);
2 begin
3   UnregisterHotKey(Handle,aatom);
4   GlobalDeleteAtom(aatom);
5 end;