كيف اجعل البروجكت في فورم واحد

sorry i will answer in Engilsh because my keyboard at work doesn't have Arabic ...

the best way is to use Panels insted of Frames, and then you create one frame and set the layout to CradLayout or BorderLayout, when you do this you will be able to add each panel to the frame one at a time and you can swap between them easily...

i hope this may help or some one else help you here ...