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          | .
          -
,   .      -
  .       
   ,   ,  -
,  ,         -
 .          
   .

      .

        -
.

,       MDI, - J
    4.1.2.                                          -

   MDI    
 .     FormStyle  
fsMDIForm,      fsMDIChild.     
      ,   -
      (  4.7.2 
,        ).

 ,     ,   
          
  .     :

__ *  = new    (this) ;

if (!) return;

 ,   
->3();

     new    
       .  
 -     . , - ;

    -   ( Caption - |
 ),     :   . -
       .

, ,     UMain  , -
    ] ,     UDoc    
FDoc,   TFDoc (       
       ,  -
  ,   ,    C++Buil-
der ,        -
 ).

         -
,      UDoc (. 
4.7.2  4.7.4).    ,     -
   | ,    :

TFDoc *TF = new TFDoc(this);

if ( ! TF) return;                                                       ,

TF->Show();                                                              '

     ,   
 .           . 

 MDIChildCount     . 
 ,         |
     TF:                                

TF->Caption = " " + IntToStr(MDIChildCount);                    