c# - com port
Dear asic1984,
Here it is (article and source code):
SERIAL COMM
Use P/Invoke to Develop a .NET Base Class Library for Serial Device Communications
by John Hind
h**p://msdn.microsoft.com/msdnmag/issues/02/10/NETSerialComm/default.aspx
The best article for controling an RS232 port from managed code (C#).
It was tested by me from a long time and the code works 100% (even in Win98!!).
There are many articles about this subject on Internet, but many of them contain mistakes, therefore i highly recomend U this one, for a starting point to your projects!!