CAsyncSocket and SendTo function

[Berras]

I am trying to make a network program that uses CAsyncSocket. When I try to send data using the SendTo function it comes up with an error and the data is not sent. After a bit of testing I discovered the error (as an interger) is sometimes 0 and sometimes -1. But I do not know what these errors mean. Any suggestions??
Thanks.
James

 

[Salem]

You could try calling GetLastError to get more information on the reason for the failure.

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[Berras]

It still comes up with a an error 0.