182______________________________________________ 3

. ,  Frequency = 2,     
     (  Frequency -
     . 3. 23).

 LineSize  PageSize ,   ,
         
  PageUp  PageDown.

 SelStart  SelEnd      -
  (.    . 3. 23),   -  -
, ,   .     -
      .

        ScrollBar,  
        .   
    Windows. ,    
   (,    C++Builder  -
  ),   ,   TrackBar.

  ScrollBar  Position, Min    ,   
TrackBar.  Kind,     -
      sbHorizontal 
sbVertical,   Orientation  TrackBar.

  ,   LineSize  PageSize  Track-
Bar: SmallChange  LargeChange.     
           ,  -
           -
  PgUp  PgDn.

,      -
  OnScroll.        
 int &ScrollPos   ,   ,   
,    ScrollCode,   
.     :

scLineUp, scLineDown   :   
        
     

scPageUp, scPageDown  :    
      PgUp 
PgDn

scPosition                 
scTrack                  

scTop, scBottom            -
        
 

scEndScroll            

   ScrollPos   , 
    ,    , 
  ,     Scroll-
Pos.