>When you hide form, it loses its modal state. Thus second 'show' just shows it non-modal and current modal form is currently in the focus.

Never heard that modal form after hiding wil loose its modality. also, if it would be so, then first modal form WILL be accesible by click on its area, but it is not active and not accessible. Second modal form that is behind first form shown as active and it really has a focus because I can do things like pressing buttons etc on second form

>Try to use show() method with modal parameter to force form to be shown as modal.

Same thing

>Another though is to try to call Activate method of that form.

Activate is an event, not method, thus it will not have any effect