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MILERR_WIN32ERROR
MILERR_WIN32ERROR is a Windows Media Integration Layer (MIL) HRESULT. It indicates that MIL encountered a Win32 failure while completing the rendering-related request.
Diagnostic discriminator: Capture the original Win32 error before MIL maps it to this HRESULT. That lower-level code determines the corrective action; treating MILERR_WIN32ERROR by itself as a rendering defect discards the actionable failure source.
What to check for MILERR_WIN32ERROR
- Capture the preceding Win32 error, HRESULT, or event-log entry that identifies the underlying failure.
- Check access to the window, display device, files, and shared resources used by the operation.
- Fix the underlying Windows failure rather than treating this result as a standalone rendering error.
Microsoft documentation about WPF hardware-accelerated rendering
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