Rhodes does not support integration of third party keyboard out of the box.
But you can create native extension to support third party keyboard in Rhodes.
thank you for your help.
Do you know where I can find saples/docs of native extensions for windows mobile?
For the moment all native extensions samples I found where for IOS or android.
just take a look at the sourcecode of Rhodes. Some of the APIs are implemented as extensions:
Generic information on how to write extensions, are available in the docs and on Launchpad: