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UCEERR_FEEDBACK_UNSUPPORTED
UCEERR_FEEDBACK_UNSUPPORTED is a Windows User Composition Engine (UCE) HRESULT. It indicates that the requested feature requires transport feedback that is not implemented or available in the active composition path.
What to check for UCEERR_FEEDBACK_UNSUPPORTED
- Check feature, transport, and session compatibility before enabling the operation.
- Use a supported fallback behavior that does not require composition feedback.
- Test across the target Windows versions and local or remote display scenarios used by the application.
Microsoft guidance for WPF render-thread failures
Diagnostic discriminator: Identify the feedback operation requested from the composition engine and compare it with supported feedback capabilities. This status is an unsupported feedback feature, not a generic channel error.
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