tabControl and navgationController Simultaaneously

Am attaching a sample project here,
In that clicking on the image on page 1 will make navigation control as keycontrol,then the page is changed to page 4, then clicking in the image in page 4 will make page 5 appear.

What I need is that from page4 I want to come back to page1 and make keycontrol as tab control.Can some one help me with that???

from B4X Community - Android, iOS, desktop, server and IoT programming tools http://ift.tt/291rDqm
via IFTTT