switch input method (details) - Transscriber

I am just wondering and do not know if it is possible:

I am working partially at an application that guides the user through a bunch of dialogs where he has to enter in a text box either text or numbers. While playing with the dialogs I used a PDA with no keyboard and used the transscriber, but it is kind of nasty to manually have to switch between the letter recognition and the number recognition, especially because the application "knows" what format you have to enter in the text box that you are at.

So the question is: is it possible to programmatically 1) detect if the transscriber is used for input and 2) switch the recognition mode of the transscriber to whatever is needed next