\n\nLast time<\/A>, we looked at a customer who wanted to know how to tell\nwhether a given folder was a Recycle Bin folder or not.\nWe answered the question as stated,\nbut made the mistake of not looking\nat the problem the customer was trying to solve.\n<\/P>\n
\nI need to know which folders are Recycle Bin folders so I can\nskip over them when searching the drive for content.\n<\/BLOCKQUOTE>\n\nAh, the real question isn’t “How can I tell whether a directory\nis a Recycle Bin folder?” but rather\n“How can I tell whether a directory contains weird stuff that\nwe shouldn’t be showing to the user (of which Recycle Bin files\nare just one example)?”\n<\/P>\n
\nThe way to mark a folder as containing stuff that you shouldn’t\nbother the user with is to set both the
FILE_ATTRIBUTE_HIDDEN<\/CODE>\nandFILE_ATTRIBUTE_SYSTEM<\/CODE> attributes.\nIn addition to Recycle Bin directories, this also prevents you\nfrom searching weird things like System Restore points.\n(Though for some reason it doesn’t stop you from searching\nTemporary Internet Files; I don’t know whether that is a bug or a feature.)\n<\/P>\n\nTherefore, the answer to “How can I tell whether a directory\ncontains weird stuff that we shouldn’t be showing to the user?”\nis to test for the hidden and system attributes.\n<\/P>\n
\nBOOL IsWeirdDirectory(LPCTSTR pszDir)\n{\n DWORD dwAttr = GetFileAttributes(pszDir);\n return dwAttr != INVALID_FILE_ATTRIBUTES &&\n ((dwAttr & (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN))\n == (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN));\n}\n<\/PRE><\/p>\n","protected":false},"excerpt":{"rendered":"Last time, we looked at a customer who wanted to know how to tell whether a given folder was a Recycle Bin folder or not. We answered the question as stated, but made the mistake of not looking at the problem the customer was trying to solve. I need to know which folders are Recycle […]<\/p>\n","protected":false},"author":1069,"featured_media":111744,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[25],"class_list":["post-20833","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oldnewthing","tag-code"],"acf":[],"blog_post_summary":"
Last time, we looked at a customer who wanted to know how to tell whether a given folder was a Recycle Bin folder or not. We answered the question as stated, but made the mistake of not looking at the problem the customer was trying to solve. I need to know which folders are Recycle […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/20833","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/users\/1069"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/comments?post=20833"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/20833\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media\/111744"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media?parent=20833"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/categories?post=20833"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/tags?post=20833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}