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winapidynamic-loading

GetStagedPackageOrigin is not found in Kernel32.dll as documented, but in Kernelbase.dll instead

I'm trying to load GetStagedPackageOrigin WinAPI dynamically using LoadLibrary and GetProcAddress so that my app could also run on Windows 7. So according to documentation that API is supposed to be imported from Kernel32.dll, but in reality (in my Windows 10 v1709) it is not.

I was able to find it in Kernelbase.dll instead:

enter image description here

So I'm wondering, can I dynamically load it from Kernelbase.dll instead?

Solution

  • this definitely bug in documentation. if we call (test on win10)

    GetProcAddress(GetModuleHandle(L"kernel32"), "GetStagedPackageOrigin");

    we got 0 - this mean that this api not exported or forwarded from kernel32.dll

    but if call

    GetProcAddress(GetModuleHandle(L"kernelbase"), "GetStagedPackageOrigin");

    we got it real address.

    next - when I search in latest sdk libs - I not found GetStagedPackageOrigin in kernel32.lib too. only one lib containing this symbol - OneCoreUap.lib umbrella library - and marked it exported from api-ms-win-appmodel-runtime-l1-1-1.dll .this dll resolved in runtime to kernel.appcore.dll. implementation - simply jump to kernelbase.GetStagedPackageOrigin

    so most correct I think try import this api from api-ms-win-appmodel-runtime-l1-1-1.dll

    very strange appraisal for my look :) with so simply question anybody can easy test this simply code on win8.1, win10

    GetProcAddress(LoadLibrary(L"kernel32"), "GetStagedPackageOrigin");//fail
GetProcAddress(LoadLibrary(L"kernelbase"), "GetStagedPackageOrigin");//ok
GetProcAddress(LoadLibrary(L"kernel.appcore.dll"), "GetStagedPackageOrigin");//ok
GetProcAddress(LoadLibrary(L"api-ms-win-appmodel-runtime-l1-1-1"), "GetStagedPackageOrigin");//ok

    and view that by fact GetStagedPackageOrigin not exported from kernel32.dll. this is simply fact.

    about lib file - i have no win8.1 sdk under hand, but i search this api in 10.x sdk version through lib files - and i found that this api implemented only in OneCoreUap.lib (not this symbol in kernel32.lib). and OneCoreUap.lib say that this api ix exported by api-ms-win-appmodel-runtime-l1-1-1.dll. so if we link with this lib - we by fact will be try import this api with api-ms-win-appmodel-runtime-l1-1-1.dll (this name will be hardcoded in our pe file). so we need or link with OneCoreUap.lib (i advice add it at the end of lib list) or direct call GetProcAddress(LoadLibrary(L"api-ms-win-appmodel-runtime-l1-1-1"), "GetStagedPackageOrigin");.

    and can note that which header files use - absolute not related to question at all. if somebody not agree with this - can i ask - which lib need use - please concrete answer. and from which dll - please concrete dll name application will be use when use this lib (this dll name will be hardcoded in pe import table)