   C++,  C++Builder, API Windows________________887



    ,  
     .   -
       ,    -
   .      
Windows.

 RegisterWindowMessage     ,
         . 
       
       WM_USER  Ox7FFF.

14.15.1.4 WM_USER - 

       -




 WM_USER     ,
  Windows,     . 
      :

 0  WM_USER  1    ,  Windows

 WM_USER  Ox7FFF      
 

 08000  OxBFFF     ,    -
  Windows

   OxFFFF     ,   , -
      -
  RegisterWindowMessage

 OxFFFF          ,    -
  Windows

     WM_USER  Ox7FFF  
         -
.      ,  
  ,    
  (, TButton, TEdit, TListBox  TComboBox)  -
  .       
   ,      
       .

14.15.1.5 TMessage  

  ,   Windows  -
   WndProc

 Messages



Messages

struct TMessage
{
Cardinal Msg;