From Forum Nokia Wiki

ID	KIS000708	Creation date	July 4, 2007
Platform	S60 3rd Edition S60 3rd Edition, FP1	Devices
Category	Symbian C++	Subcategory	UI

Keywords (APIs, classes, methods, functions):

Overview

RWindowGroup::CaptureKey() can be used for capturing key events when the application is not on the foreground. However, this should not be done for numeric key events, as it will cause problems with the idle view of the phone application.

Description'

When an application tries to capture events from numeric keys [0..9,*,#] with RWindowGroup::CaptureKey(), the capture process will fail when the phone application (in idle view) is on the foreground. Furthermore, capturing events from these keys will prevent the phone application from handling them properly.
Note that SwEvent capability is required for RWindowGroup::CaptureKey().

Solution

No known solution. Applications should not try to capture events from keys 0..9, ’*’ or ’#’.