Android Question Custom View with 2 alternating forms

Good Day Everyone, I'm new from B4A...I just created a sample using multiple forms using designer. A friend of mine suggested me to use customview which is more easy to manage in the long run. It would be a big help if you can assist me or show me how customview with atleast 2 forms having 1 or 2 controls each can be created...both can call each other to set itself as an active window when called. Thanks In Advance