TControl.ClientHeight Property

Specifies the height of the control's client area in pixels.

Pascal

property ClientHeight: Integer;

C++

__property int ClientHeight;

Description

Use ClientHeight to read or change the height of the control's client area.

For TControl, ClientHeight is the same as Height. Derived classes may implement a ClientHeight property that differs from Height. For example, the ClientHeight of a form is the value of the Height property minus the height of the title bar, resize border, and scroll bars.

C++ Examples:

Copy Code

/*
The following example demonstrates form scrolling with the
PgUp and PgDn keys.
*/
void __fastcall TForm1::FormKeyDown(TObject *Sender, WORD &Key,
      TShiftState Shift)
{
  const int iPageDelta = 10;

  if (Key == VK_NEXT)
    VertScrollBar->Position += iPageDelta;
  else if (Key == VK_PRIOR)
    VertScrollBar->Position -= iPageDelta;
}

Delphi Examples:

Copy Code

{
The following example demonstrates form scrolling with the
PgUp and PgDn keys.
}
procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
const
  PageDelta = 10;
begin
  With VertScrollbar do
    if Key = VK_NEXT then
      Position := Position + PageDelta
    else if Key = VK_PRIOR then
      Position := Position - PageDelta;
end;