how to call WDA Application from an other SAP System

hello all,

I have a WDA Application and if the user click on a Button in this Application,  i need to call an other WDA Application from an other SAP System.

example:  SYStem  X01 has a WDA Application and there is a Button in this Application, if the User click on this Button, a WDA Application from an Other System X09 shoud be displayed in the same window, same WDA IFRAME .

can any one tell me how can I do this?

Thank you all