Makes an asynchronous request to a JPIP server.
path
A System.String representing the resource to locate at the server. This is usually the image name to locate.
requestFields
A Leadtools.Jpip.RequestFields object which contains the JPIP fields.
callBack
A System.Delegate to call when this method is completed and a response is received from the server.
state
An System.Object that contains state information for this request.
An System.IAsyncResult that references the asynchronous request.