Inserting & Retrieving Unicode with libpq

I've been trying to figure out all day how to insert and retrieve
unicode data from my table? My database is defined as:

List of databases
Name | Owner | Encoding
-----------+----------+-----------
mydata | postgres | UTF8

The exported methods from libpq either accept char* as the input or
return char*. I would like to be able to pass in wchar_t* and return
wchar_t* parameters. Is this possible with the current libpq module?
I've tried using the 'wcstombs' function to convert wide chars to
multi-byte, but that hasn't been working for me (all of my data is wide
chars).

Any help or suggestions would be much apprecaited.

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