How to avoid SetCurrentProcessExplicitAppUserModelID causing duplicating of the taskbar icon?

Nikita Provotorov 21 Reputation points
2020-10-30T10:30:06.03+00:00

Hi!
I edited the official Microsoft sample of using custom Jump Lists in that way it invokes SetCurrentProcessExplicitAppUserModelID system call right when wWinMain started. Then if I pin the built application to the taskbar and run it, Windows duplicates its icons:
36257-image.png

How can I avoid it except "do not use SetCurrentProcessExplicitAppUserModelID"? I really need custom AppUserModelId for my production application.

Windows API - Win32
Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
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  1. RLWA32 45,476 Reputation points
    2020-11-02T10:53:24.387+00:00

    Since your concerns revolve around an actual application and not a standalone sample I did another test.

    I created a Windows Installer (.msi) for the CustomJumpListSample. The executable was installed to a folder under Program Files and a shortcut to the executable was installed to the user's start menu. As documented at where-to-assign-an-appusermodelid the MsiShortcutProperty table was used.

    After installing the sample application and before running it, I navigated to the installed executable under Program Files and manually pinned it to the taskbar. Note that I used the .exe for pinning, not the shortcut.

    Subsequently, multiple running instances of the CustomJumpListSample did not produce duplicate icons on the taskbar.

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  1. RLWA32 45,476 Reputation points
    2020-11-01T13:11:50.16+00:00

    You can avoid the problem by creating a shortcut (IShellLink) to the application and setting the System.AppUserModel.ID property in the shortcut's property store to the value that the application passes to SetCurrentProcessExplicitAppUserModelID. Pin the shortcut to the taskbar.

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