[Bug 59625] New: shcore: Set/GetCurrentProcessExplicitAppUserModelID are stubs

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59625

            Bug ID: 59625
           Summary: shcore: Set/GetCurrentProcessExplicitAppUserModelID
                    are stubs
           Product: Wine
           Version: 11.6
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: shell32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

SetCurrentProcessExplicitAppUserModelID in shcore.dll returns S_OK but discards
the value. GetCurrentProcessExplicitAppUserModelID always returns NULL with
E_NOTIMPL.

This causes .NET WPF applications that call
SetCurrentProcessExplicitAppUserModelID during startup and later retrieve it
via GetCurrentProcessExplicitAppUserModelID to crash with "String argument
cannot be null or empty" (ArgumentException).

Steps to reproduce:
1. Call SetCurrentProcessExplicitAppUserModelID(L"MyApp.Id")
2. Call GetCurrentProcessExplicitAppUserModelID(&id)
3. id is NULL instead of L"MyApp.Id"

Expected: id == L"MyApp.Id", hr == S_OK
Actual: id == NULL, hr == E_NOTIMPL

A fix with tests is ready.

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