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I am using 3 Screens as follows:

1. First Screen is a Splash Screen.
2.Second Screen is a Form which contains listwidget, softkeys etc..
3.Third Screen is some input screen.

How can i navigate from one screen to other screen.while navigating
from splash screen to second screen,up and down keys of listwidget are
not working and also splash screen is not loaded which i specified.It
resembles like a blank screen.

Please Give me the solution to solve this problem.

Generally splash screen is displayed for short time (<3 secs). You can have a timer to go to next screen from splash screen.
E.g. Display splash, set timer of say 3 secs and in timer callback
function call methods to display next screen. See ISHELL_SetTimer() API
reference for more details.
In Forms based applications, you can use IRootForm_PushForm(),
IRootForm_PopForm() to change the screens. Also refer
IForm_Activate/Deactivate methods.
In widgets, you can control/move to different screens using IRootContainer_SetPos().
Regarding event handling, take acre that events are routed to proper elements. You can maintain application states to do that.

Generally splash screen is displayed for short time (<3 secs). You can have a timer to go to next screen from splash screen.
E.g. Display splash, set timer of say 3 secs and in timer callback
function call methods to display next screen. See ISHELL_SetTimer() API
reference for more details.
In Forms based applications, you can use IRootForm_PushForm(),
IRootForm_PopForm() to change the screens. Also refer
IForm_Activate/Deactivate methods.
In widgets, you can control/move to different screens using IRootContainer_SetPos().
Regarding event handling, take acre that events are routed to proper elements. You can maintain application states to do that.