help with a small project - Unicode fields

Hello guys,

I am really lost in this task and maybe you can give me a hand.

I have a form with 3 fields. Each field is to type any kind of word, but each field must accept only a particular language.

1º Field = English

2º Field = Hebrew

3º Field = Greek

What I need to make the application do:

When I enter in the field, I want to change the keyboard configuration to write only the character of the suitable language. How can I change my keyboard automatically when enter, for example, in the Hebrew field or Greek field?

I use delphi 2010 and XE4

could you give me an example how to do that?

Thanks
Alex