Why are the parsing options grayed out when attempting to parse data from in-hdr tab?
Currently there is a dependency with the in-data tab where parsing is enabled only when there is response data and the data is readable for the response.
It is possible to manually code the parse, below is an example of how to parse the "Location" header from a HTTP 302 response which contained no response data.
WebParseDataBoundEx(sLocation, STRING_COMPLETE, ToEncoding("Location:"), 1, ToEncoding("\r\n"),WEB_FLAG_IGNORE_WHITE_SPACE | WEB_FLAG_CASE_SENSITIVE | WEB_FLAG_HEADER_ONLY | WEB_FLAG_ALL_RESPONSES, 2);
There is an RFE logged for this dependency to be removed in a future version.