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Editorial Team
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Asked: 2026-05-11T18:57:08+00:00

I am trying to use a CBT hook to receive HCBT_MOVESIZE notifications. It works

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I am trying to use a CBT hook to receive HCBT_MOVESIZE notifications. It works fine for all applications when I run my program from a folder on my desktop. When I install the application to the “Program Files” or “Program Files (x86” folder I only receive notifications for my own application. The .exe file is signed and works perfectly in Windows XP. I am only receiving these errors in Vista x86/x64. Can anyone offer any suggestions on how to troubleshoot this? Thanks!

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1 Answer

  1. Editorial Team

    Might be a UIPI issue:

    User Interface Privilege Isolation
    (UIPI) implements restrictions in the
    windows subsystem that prevents
    lower-privilege applications from
    sending window messages or installing
    hooks     in higher-privilege processes.

    from Microsoft’s Windows Integrity Mechanism Design

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