Delphi Inactive Forms Behavior

In Delphi 7, there is one drawback in VCL, which appears as lack of any indication of which window is active when user clicks with mouse on inactive window. Standard behavior of compliant windows application is to flash the title bar of active modal window in that case, but Delphi forms do not respond to this action.

To remedy this, add the following code to your modal forms:

type
  TMyForm = class(TForm)
  ...
  protected
    procedure CreateParams(var Para: TCreateParams); override;
  ....
  end;
.... 
procedure TMyForm.CreateParams(var Para: TCreateParams);
begin
  inherited;
  Para.WndParent := GetActiveWindow;//to allow title flashing of child modal dialogs
end;