{"id":340,"date":"2026-10-06T09:00:16","date_gmt":"2026-10-06T16:00:16","guid":{"rendered":"https:\/\/devblogs.microsoft.com\/insidemsix\/?p=340"},"modified":"2026-09-27T22:45:08","modified_gmt":"2026-09-28T05:45:08","slug":"find-package-identity-with-apis","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/insidemsix\/find-package-identity-with-apis\/","title":{"rendered":"Is it MSIX? Part 2: Finding Package Identity with APIs"},"content":{"rendered":"

We previously<\/a> determined how to tell if a process is packaged or unpackaged using Task Manager<\/strong>. Now let’s find its package and application identity in code.<\/p>\n

Windows provides APIs to retrieve package and application identity for a process:<\/p>\n\n\n\n\n\n\n\n\n
Identity<\/th>\nCurrent Process<\/th>\nBy Process HANDLE<\/code><\/th>\nBy Token<\/th>\n<\/tr>\n<\/thead>\n
PACKAGE_ID<\/a><\/td>\nGetCurrentPackageId()<\/a><\/td>\nGetPackageId()<\/a><\/td>\nN\/A<\/td>\n<\/tr>\n
PackageFullName<\/td>\nGetCurrentPackageFullName()<\/a><\/td>\nGetPackageFullName()<\/a><\/td>\nGetPackageFullNameFromToken()<\/a><\/td>\n<\/tr>\n
PackageFamilyName<\/td>\nGetCurrentPackageFamilyName()<\/a><\/td>\nGetPackageFamilyName()<\/a><\/td>\nGetPackageFamilyNameFromToken()<\/a><\/td>\n<\/tr>\n
ApplicationUserModelId<\/td>\nGetCurrentApplicationUserModelId()<\/a><\/td>\nGetApplicationUserModelId()<\/a><\/td>\nGetApplicationUserModelIdFromToken()<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

If you prefer WinRT:<\/p>\n\n\n\n\n\n\n
Class<\/th>\nCurrent Process<\/th>\n<\/tr>\n<\/thead>\n
PackageId<\/a><\/td>\nWindows.ApplicationModel.Package.Current<\/a>.Id<\/td>\n<\/tr>\n
AppInfo<\/a><\/td>\nWindows.ApplicationModel.AppInfo.Current<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Kernel mode<\/h2>\n

What about kernel mode? Nearly all MSIX APIs require a user-mode caller. The Windows Driver Kit (WDK)<\/a> provides RtlQueryPackageIdentity()<\/a> and RtlQueryPackageIdentityEx()<\/a> for querying package identity from a token.<\/p>\n

Tools?<\/h2>\n

What about tools to do the same? Onward to Part 3…<\/p>\n

\n

1<\/sup> RtlQueryPackageIdentity[Ex]()<\/code> returns PackageFullName<\/code> but provides only the Package-Relative Application ID (PRAID) portion of application identity. Additional work is required to compose an ApplicationUserModelId<\/code>. This is advanced territory best left to a future blog post.\ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"

We previously determined how to tell if a process is packaged or unpackaged using Task Manager. Now let’s find its package and application identity in code. Windows provides APIs to retrieve package and application identity for a process: Identity Current Process By Process HANDLE By Token PACKAGE_ID GetCurrentPackageId() GetPackageId() N\/A PackageFullName GetCurrentPackageFullName() GetPackageFullName() GetPackageFullNameFromToken() PackageFamilyName […]<\/p>\n","protected":false},"author":911,"featured_media":101,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[17,9,11,2,34],"class_list":["post-340","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-msix","tag-application","tag-code","tag-identity","tag-msix","tag-runtime"],"acf":[],"blog_post_summary":"

We previously determined how to tell if a process is packaged or unpackaged using Task Manager. Now let’s find its package and application identity in code. Windows provides APIs to retrieve package and application identity for a process: Identity Current Process By Process HANDLE By Token PACKAGE_ID GetCurrentPackageId() GetPackageId() N\/A PackageFullName GetCurrentPackageFullName() GetPackageFullName() GetPackageFullNameFromToken() PackageFamilyName […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/posts\/340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/users\/911"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/comments?post=340"}],"version-history":[{"count":2,"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/posts\/340\/revisions"}],"predecessor-version":[{"id":356,"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/posts\/340\/revisions\/356"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/media\/101"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/media?parent=340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/categories?post=340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/insidemsix\/wp-json\/wp\/v2\/tags?post=340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}