libxrdeveloper's documentation
void xr_call_serialize_request ( xr_call call,
char **  buf,
int *  len 
)

Serialize call object into XML-RPC request.

Parameters:
callCall obejct.
bufPointer to the variable to store buffer pointer to. This buffer has to be freed using xr_call_free_buffer.
lenPointer to the variable to store buffer length to.
Documentation for libxr, Wed Feb 29 2012 09:04:03.