I have a problem. My site is containing ms office documents (doc,xls). When users click on a link in Internet Explorer they get the choice to either "open", "save" or "save as". How do I disable the option "Open"? I do not want the user to open the file.
X-Download-Options HTTP response header was introduced in IE8 to control visibility of the "Open" button on the file download dialog. I wrote about this header here:
This header partially obsoletes existing "DownloadOptions" META tag which was introduced in IE6 on XPSP2: http://msdn.microsoft.com/en-us/library/ms533689(VS.85).aspx