dll - Building/calling librsync on Windows from Delphi 2010

Question

I'm currently using the rdiff windows port from my delphi 2010 application to calculate delta/signature for remote delta/diff

I'm trying to explore the possibility of using the librsync library instead of rdiff, I googled & read a lot, I found these files (can be found/installed using cygwin - librsync-dev-0.9.7-3):

cygrsync-1.dll
librsync.a
librsync.dll.a
librsync.la

However, it's not clear at all how to call this dll (assuming it's even possible!)

Anyone knows how to call the librsync/cygrsync-1.dll from Delphi 2010?

Thanks!