I want download just a part of a file via http .

As i know, in java, setting a Property name "range" with it's value is "bytes=1-32*1024" can done this, it can download only first 32k content of the file

But in Symbian, how can i do this? it seems use HTTP::ERange, but how to set this Property ?

I tried : RHTTPConnectionInfo::SetPropertyL;
RHTTPTransactionPropertySet::SetPropertyL;
RHTTPHeaders::SetFieldL;

but all fail, can anyone help me?