Stop the IdHTTP.Post stream upload without closing the connection

[vladimir]

And come to think of it, what is the best way to send a Post/Patch with a stream, not from the beginning of the stream, but from the current stream position.
The IOHandler Write() method has parameters to control that, but the way it is called from TIdHTTP it always resets the stream pos to 0.
Is there any method or property that I have missed that allows control of it from TIdHTTP?

Thanks.