Setting behavior of CEikButton in resource

PICMBUT {
behavior = EEikButStaysClear | EEikButStaysSet | EEikButLatches | EEikButReportOnPointerDown;
...
}

Use:
EEikButStaysClear | EEikButStaysSet | EEikButLatches | EEikButReportOnPointerDown
instead of:
EEikButtonStaysClear | EEikButtonStaysSet | EEikButtonLatches | EEikButtonReportOnPointerDown

Extended error messages in Symbian

To show extended error messages on Symbian device or emulator create an empty file named ErrRd in C:Systembootdata and reboot

CSdpAgent

"undefined refence to CSdpAgent::NewL(...)" is caused by missing sdpagent.lib. Link against this library to solve the problem.