[Mono-list] DllImport ... help

[Stewart Allen]

I've been struggling with DllImport all evening just to call 
gethostname(char *buf, int len). Seems like it should be simple. There 
appear to be a lot of examples of sending string arguments and getting 
string return values, but I can't find anything that addresses filling a 
preallocated string buffer.

most tests (that I can get to compile) result in:

** (process:7): WARNING **: unhandled exception 
System.NullReferenceException: "A null value was found where an object 
instance was required"

Any help is greatly appreciated.