Android : HTC Magic / Keyboard Compatibility Errors

I've been testing my application on a HTC magic and it's incompatible with the keyboard that ships with the magic.My application allows the on-screen keyboard to be displayed when the user clicks on icon on the screen. When using the emulator the way that I determine that the keyboard has been hidden is through responding to the KEYCODE_BACK keyevent. On the HTC keyboard there is an additional key that allows the keyboard to be hidden. When this key is pressed the keyboard is hidden but no KeyEvent is sent to the application with the result that the application is now out of sync with the keyboard state.In general is there a way to detect software keyboard hide / show events in a non-vendor specific manner? This would be highly useful for any application that is implementing custom views.