RE: URLDownloadToCacheFile and Pluggable Protocol Handler

Hi Simon,
From my research, there is no need to use CreateUrlCacheEntry and
CommitUrlCacheEntry if you used URLDownloadToCacheFile.
Generally CreateUrlCacheEntry and CommitUrlCacheEntry are used together
with IInternetProtocol::Read or ifstream. You may refer to:
http://www.codeproject.com/system/WritingIE.asp

You may check if this issue is caused by your pluggable protocol handler. I
found article regarding pluggable protocol handler. You may check if it is
helpful to you:
An Asynchronous Pluggable Protocol Handler for data: URLs
http://www.codeproject.com/internet/DataProtocol.asp

Hope this helps.

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Best regards,
Charles Wang
Microsoft Online Community Support
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