   ____________________423

,   ,    
     ,    false,  -
  .       false,   
 true.

      protected.  , 
    ,     
 .

      public    TEdit-
LetNum,    .     -
   ,     .

        -
    .       ,
-   .

           -
 .  ( File | Open)   , 
     - .    --
  (, Test).    ( Project
| Make All Projects).     ,     
       .    
  EnableNum  EnableLet.      -
    true.      false.
    ,       .

 Modified      ,    
     .

7.3.2.3. 

        public, 
     .      -
ditLetNum,   .      Clear, -
        FModi-
fied  false.   OnClear    .  
  TEdit    Clear,  ,   
,         -
  Clear     FModified.    -
     Clear   :

class PACKAGE TEditLetNum : public TEdit
{

public:

void      fastcall Clear();

};

void _fastcall TEditLetNum::Clear()
{

TEdit::Clear();          //   

FModified = false;

)

    ,     
     (   TEdit),   -
.

,            -
,      :