Implementing "Back" functionality

Hi
I am using VC and CAF for implementing certain functionality.
The requirement is: I have many screens and all of them have a "Back" button.
When i click on the "Back" button the previous screen must be displayed with its values.
I think currently this may not be possible because, each VC screen is a callable object and is enclosed in an action. When we move to the next screen, the previous action is completed and the next action is triggered.
Is there any way where i can dynamically choose the next action based on certain conditions using GP Runtime API ?
or Is there any way in which i can go back to the previous action when i click on "Back".
Any other way/logic i can use to achieve this?
Hi Moderators
Could you please let me know if such functionality ("Back") is posible with Callable objects/Actions ?
Also please suggest any alternate ways in which this can be achieved.
Message was edited by:
aditya srinivasa

Thank you for the inputs Chandan.
I shall explain my requirement in detail:
Lets say i have 3 screens (Screen1, Screen2 and Screen3).
On Screen1 i have a form to enter user information (like firstname,lastname etc )
On Screen2 i have a form to enter company information (like name,address)
On Screen3 i have a form to enter user preferences information (like mailing address,permanent address)
Each of the above three screens has "Submit Info" button. When clicked on this button the entered info on that screen is submitted to an Oracle table and the next screen is shown.
Also Screen2 and Screen3 have another button - "Back". When this button is clicked on Screen2, Screen1 should be shown with the values (pre-populated in the form) previously entered by the user. When the "Back" button on Screen3 is clicked, Screen2 with its values (pre-populated in the form) should be shown.
What i have done is:
All the screens are modelled in VC. And each of them is wrapped in a callable object (iView) for integration in CAF GP.
Since we have 3 callable objects, there will be 3 actions and a sequential block in this process.
Now, Lets say i am on Screen1. I enter all the info and click on "Submit Info" button. Action1 is completed and immediately Action2 is triggered.
Action2 has Screen2 callable object in it and hence displayes Screen2. At this moment if i click on "Back" button, i want Screen1 with the details i entered in the previous step to be displayed.
Please let me know in case you need any further clarity on the requirement.

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