| << Click to display table of contents >> TrvActionCustomInfoWindow.OnShowing | 
Occurs before showing the info window.
property OnShowing: TRVShowFormEvent;
Example (embedding the info window in the main window TfrmMain, at the right side):
procedure TfrmMain.rvActionStyleInspector1Showing(Sender: TrvAction;
  Form: TForm);
begin
  Form.Align := alRight;
  Form.Parent := Self;
end;