RAD Studio VCL Reference
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StdCtrls.TScrollCode Enumeration

TScrollCode indicates what action the user performed on a scroll bar.

Pascal
TScrollCode = (
  scLineUp,
  scLineDown,
  scPageUp,
  scPageDown,
  scPosition,
  scTrack,
  scTop,
  scBottom,
  scEndScroll
);
C++
enum TScrollCode {
  scLineUp,
  scLineDown,
  scPageUp,
  scPageDown,
  scPosition,
  scTrack,
  scTop,
  scBottom,
  scEndScroll
};

StdCtrls

TScrollCode describes the type of scrolling action requested. It can be any of the following values:

Value 
Meaning 
scLineUp  
User clicked the top or left scroll arrow or pressed the Up or Left arrow key.  
scLineDown  
User clicked the bottom or right scroll arrow or pressed the Down or Right arrow key.  
scPageUp  
User clicked the area to the left of the thumb tab or pressed the PgUp key.  
scPageDown  
User clicked the area to the right of the thumb tab or pressed the PgDn key.  
scPosition  
User positioned the thumb tab and released it.  
scTrack  
User is moving the thumb tab.  
scTop  
User moved the thumb tab to the top or far left on the scroll bar.  
scBottom  
User moved the thumb tab to the bottom or far right on the scroll bar.  
scEndScroll  
User finished moving the thumb tab on the scroll bar.  

 

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