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procedure TForm1.DBGrid1MouseMove
  (Sender: TObject; Shift: TShiftState; X, Y: Integer);
var
  pt: TGridcoord;
begin
  pt:= DBGrid1.MouseCoord(x, y);

  if pt.y=0 then
    DBGrid1.Cursor:=crHandPoint
  else
    DBGrid1.Cursor:=crDefault;
end;					

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procedure TForm1.DBGrid1TitleClick(Column: TColumn);
{$J+}
 const PreviousColumnIndex : integer = -1;
{$J-}
begin
  if DBGrid1.DataSource.DataSet is TCustomADODataSet then
  with TCustomADODataSet(DBGrid1.DataSource.DataSet) do
  begin
    try
      DBGrid1.Columns[PreviousColumnIndex].title.Font.Style :=
      DBGrid1.Columns[PreviousColumnIndex].title.Font.Style - [fsBold];
    except
    end;

    Column.title.Font.Style := 
    Column.title.Font.Style + [fsBold];
    PreviousColumnIndex := Column.Index;

    if (Pos(Column.Field.FieldName, Sort) = 1)
    and (Pos(' DESC', Sort)= 0) then
      Sort := Column.Field.FieldName + ' DESC'
    else
      Sort := Column.Field.FieldName + ' ASC';
  end;
end;					

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procedure TMainForm.DBGridBookingTitleClick(Column: TColumn);
begin
  if TDBGrid(MainForm.FindComponent('DBGrid' + DBTab.ActivePage.Name)).DataSource.DataSet is TCustomADODataSet then
  with TCustomADODataSet(TDBGrid(MainForm.FindComponent('DBGrid' + DBTab.ActivePage.Name)).DataSource.DataSet) do
  begin

  TDBGrid(MainForm.FindComponent('DBGrid' + DBTab.ActivePage.Name)).Columns[TDBGrid(MainForm.FindComponent('DBGrid' + DBTab.ActivePage.Name)).Tag].Title.Color := clBtnFace;
  TDBGrid(MainForm.FindComponent('DBGrid' + DBTab.ActivePage.Name)).Columns[TDBGrid(MainForm.FindComponent('DBGrid' + DBTab.ActivePage.Name)).Tag].Title.Font.Color := clNavy;

  Column.Title.Color := $00C08000;
  Column.Title.Font.Color := clWhite;
  TDBGrid(MainForm.FindComponent('DBGrid' + DBTab.ActivePage.Name)).Tag := Column.Index;

    if (Pos(Column.FieldName, Sort) = 1)
    and (Pos(' DESC', Sort)= 0) then
      Sort := Column.FieldName + ' DESC'
    else  
      Sort := Column.FieldName + ' ASC';  
  end;

end;