...get mouse wheel line count?

//Not supported on Windows 95
//result = -1: scroll whole page

function GetNumScrollLines: Integer;
begin
  SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, @Result, 0);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  ShowMessage(IntToStr(GetNumScrollLines));
end; 

printed from
www.swissdelphicenter.ch
developers knowledge base