diffie hellman constructors

[Amerson H Lin]

Hi, 

i need some help with using diffie hellman constructors. I'm using
crypto 5.1 on redhat 9.0.

I use the following code to generate Alice's DH keys.

 AutoSeededRandomPool randPool = AutoSeededRandomPool();
 DH dh  = DH((RandomNumberGenerator&)randPool, (unsigned)128);

However, I need to generate Bob's DH class with the same generator. How
can I do that? Is there any documentation on the DH constructors, if so,
where can I find it?

thanks
amerson