I love cport-3.10 by Dejan Crnila, maintained by Lars Dybdahl and Paul Doland.
It is easy to use, but still powerful.
I have one problem though. Writing to a serial port is VERY slow. I run at baude rate 115200 and still it takes around 1000 ms per byte to send information. It receives ok.
It seems to be the same for TransmitChar() as for WriteStr().
I run Vista.
Any ideas on how to solve my problem?