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NS_E_WMP_UI_PASSTHROUGH
What this HRESULT means
Windows Media Player reports NS_E_WMP_UI_PASSTHROUGH (0xC00D0FE4) when the skin hit-test path returned its internal pass-through result rather than selecting a control. This control-flow result is owned by the XML-based skin loader that opens a skin package, finds its.wms definition, constructs views and controls, applies attributes and attaches event handlers to artwork-backed UI elements.
The additional test for this condition is to record pointer coordinates, view, z-order and the control whose hit-test delegated to content below it; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
Investigation order
- Find the first component that returned this result and label that event as the hit-test delegation boundary.
- Freeze the input and object identity associated with this event before WMP fallback or cleanup changes it.
- Reconstruct the immediately preceding successful state for this condition, then identify the call or event that crossed into failure.
- Make the targeted change—handle the pass-through result as control flow unless an outer caller incorrectly promotes it to failure—and repeat the same producing operation.
The surrounding WMP state
For this condition, a skin package combines an XML definition with image and script resources; archive validity, schema validity and runtime object construction are separate checkpoints. The second constraint is that control properties such as image dimensions, minimum/maximum values and child-element support are evaluated after basic XML parsing succeeds.
Inputs that distinguish the causes
Preserve the first occurrence before retry or fallback changes the evidence. The following fields should identify the same object instance:
| Field | What to record |
|---|---|
| What to verify | record pointer coordinates, view, z-order and the control whose hit-test delegated to content below it |
| Artifact identity | control type, object ID and parent/child relation for this reproduction |
| Runtime state | resource path, decoded dimensions and transparency/mapping attributes for this reproduction |
| Owning object | event name, first handler and any duplicate handler declaration for this reproduction |
| Lower-level result | skin archive path, member list and selected.wms definition for this reproduction |
| Correlation | THEME/version declaration and currentViewID for this reproduction |
Do not confuse it with nearby results
| Result | Different condition |
|---|---|
NS_E_WMP_UI_OBJECTNOTFOUND | attributes were parsed for a skin object that was never constructed |
NS_E_WMP_UI_VIEWIDNOTFOUND | currentViewID names a view that is not defined in the skin file |
NS_E_WMP_UI_SECONDHANDLER | a second handler is declared for an event that already has one |
What a real fix must change
- Avoid renaming arbitrary XML to.wms or repacking a skin without preserving its relative resource paths while investigating this result; it can destroy the artifact or state needed to explain it.
- Avoid editing several controls at once before identifying the first schema or construction failure; for this result, that can replace the original HRESULT with a secondary failure from another layer.
Technical references
- Windows Media Player skins — normative or platform material relevant to this HRESULT.
- Skin definition file structure — API or format context.
- Skin definition XML structure — documentation for this HRESULT.
- Skin files and package contents — normative or platform material relevant to this HRESULT.
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