sending a large string

I am using winsock.senddata to send a large string (over 200 characters) of information.

Is there a limit on how big the string can be as in file transferring? If so, do I need to "chunk it" as in file transfers if the string exceeds 1000 characters? Is there a way to determine what the max string size should be?

Input and suggestions are welcome.

Send a few larger strings across and see if the is a limit.

I use 200 characters just to be safe.