SOAPCtxAddFile is available since version 1.0.
Prototype:
number SOAPCtxAddFile(number soap_ctx, string filename, string content_type, string dest_href)
Parameters
filename
[in] the file name
content_type
[in] content type
dest_href
[in] destination href
Description:
Add a file.
Return value:
Returns null if succeeded, or an error handle (to get the error text, you should call
SOAPError)