kennyzx kennyzx - 3 years ago 239
C# Question

64 bit side-loaded app to use Brokered Windows Runtime Components

I have a 32-bit (x86) side-loaded

Windows Store app
that works with a brokered Windows Runtime Component, it works smoothly and can launch desktop exe, load desktop dll using Reflection, etc.

I want to make this side-loaded app 64-bit. And after rebuilding the app as x64, it can never use the brokered Windows Runtime Component again. The error is

Additional information:

Unable to cast COM object of type 'StoreAppBrokeredWindowsRuntimeComponent.DirectInvoker' to interface type 'StoreAppBrokeredWindowsRuntimeComponent.IDirectInvokerClass'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{50EA3FD3-2383-5445-4002-8CBCBED5DB0F}' failed due to the following error: Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).

From the doc Brokered Windows Runtime Components for a side-loaded Windows Store app,

Side-loaded applications can be 64-bit (provided there is both a 64-bit and 32-bit proxies registered), but this will be atypical.


How to build a 64-bit proxy?

The VS template can only build 32 bit (Win32) proxy. If change the
to x64, it cannot even be compiled - there are a bunch of LINK errors.

enter image description here

So 32-bit side-loaded app, 32-bit brokered Windows runtime component, and 32-bit proxy is the only working approach so far.

Answer Source

With the help of Microsoft Support, I have successfully built and used 64 bit brokered runtime components (from a 64bit side-loaded app).

To make it easier to follow, just use the following MS sample projects. You don't need to modify any code file at all.

Brokered Windows Runtime Components for side-loaded Windows Store apps - Server

Brokered Windows Runtime Components for side-loaded Windows Store apps - Client

Steps to build 64-bit brokered component and proxy

  1. Unzip the code package(Brokered Windows Runtime Components for side-loaded Windows Store apps - and open the solution with Visual studio 2013 (Run as Administrator);

  2. Change the platform of SampleProxy project from Win32 to x64;

  3. Modify SampleProxy Property->Configuration Properties->Preprocessor->Preprocessor Definitions, and change


  1. Change the platform of EnterpriseIPCServer project to x64.

  2. Edit Post-build event command line of EnterpriseIPCServer, replace x86/Win32 with x64, the command should be like this:

call "$(DevEnvDir)..\..\vc\vcvarsall.bat" x64

md "$(TargetDir)"\impl
md "$(TargetDir)"\reference

erase "$(TargetDir)\impl\*.winmd"
erase "$(TargetDir)\impl\*.pdb"
rem erase "$(TargetDir)\reference\*.winmd"

xcopy /y "$(TargetPath)" "$(TargetDir)impl"
xcopy /y "$(TargetDir)*.pdb" "$(TargetDir)impl"

winmdidl /nosystemdeclares /metadata_dir:C:\Windows\System32\Winmetadata "$(TargetPath)"

midl /metadata_dir "%WindowsSdkDir%References\CommonConfiguration\Neutral" /iid "$(SolutionDir)SampleProxy\$(TargetName)_i.c" /env x64 /x64 /h "$(SolutionDir)SampleProxy\$(TargetName).h" /winmd "$(TargetName).winmd" /W1 /char signed /nologo /winrt /dlldata "$(SolutionDir)SampleProxy\dlldata.c" /proxy "$(SolutionDir)SampleProxy\$(TargetName)_p.c"  "$(TargetName).idl"

mdmerge -n 1 -i "$(ProjectDir)bin\$(PlatformName)\$(ConfigurationName)" -o "$(TargetDir)reference" -metadata_dir "%WindowsSdkDir%References\CommonConfiguration\Neutral" -partial

rem erase "$(TargetPath)"
  1. Build the solution "Brokered Windows Runtime Components for side-loaded Windows Store apps - Server".

Check the output files (Fabrikam.winmd & SampleProxy.dll).

For your reference, I have uploaded the code to this GitHub repository.

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