by sunwind, http://ahk8.com/thread-5707-post-33454.html

检测标题栏按钮点击.ahk

~LButton::
 ;~ if WinExist("ahk_class Notepad")
 ;~ MsgBox % "The active window's ID is " . WinExist("A")
 mylist=ahk_class Notepad++ ,ahk_class Notepad,ahk_class SciTEWindow
 WinGetClass,abc,A
 tance:="ahk_class " abc
 if tance contains %mylist%   
 {
   CoordMode, Mouse, Screen
   MouseGetPos, m_x, m_y, m_hw_target
   ; WM_NCHITTEST
   SendMessage, 0x84,, ( m_y << 16 )|m_x,, ahk_id %m_hw_target%
   If ( m_hw_target = WinExist( tance ) )   #------------这部份就是为了下面的text变量赋值。可要可不要。
     {
       If ( ErrorLevel = 2 )          ; HTCaption
           text = Caption
       Else If ( ErrorLevel = 3 )      ; HTSysMenu
           text = system Menu
       Else If ( ErrorLevel = 8 )      ; HTMINButton
           text = Minimize Button
       Else If ( ErrorLevel = 9 )      ; HTMAXButton
           text = Maximize Button
       Else If ( ErrorLevel = 20 )      ; HTClose
           text = Close Button
       Else If ( ErrorLevel = 21 )      ; HTHELP
           text = help Button
       if ErrorLevel in 2,3,8,9,20,21
       MsgBox, Hello, Notepad's %text%!
       If ErrorLevel in 20
         {
         WinMinimize,A
         }
     }
 }
 Return