Turbovision for C?

[Glen Reesor]

I've read reviews in Byte magazine of Turbovision for its Pascal compilers.
I want to develop code sporting a windows feel but running on plain DOS.
My questions:
    - is Turbovision easy to use and efficient?
    - is it standard with Borland's C and C++ compilers?
    - are there better windowing packages available from other companies?

Thanks in advance.

Glen Reesor