I need to encrypt data with an RSA private key in the Crypto API

From: Steddy (stephen.eddy_at_btinternet.com)
Date: 05/17/03 

Date: Fri, 16 May 2003 23:41:57 +0100

I am trying to create a simplified digital signature scheme.

I have a 128bit MD5 hash that I want to encrypt with the private key
on Windows. Is there anyway to encrypt using the RSA private key from
a keypair?

If I sign the data then the signature is 128bytes in length. Is there
a way I can extract only the 16 bytes of the hash encrypted with the
private key and regenerate the rest later?

Thanks
Steve

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