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ERROR_NO_SCROLLBARS
The target window has no scroll bar for the requested operation.
ERROR_NO_SCROLLBARS is Win32 error 1447 (0x5A7). It indicates that code attempted to query or manipulate scrolling state that the target window does not expose. The missing object can be a standard horizontal or vertical window scroll bar, a scroll-bar control, or the specific bar selected by the API.
Why the bar may be absent
- the window was created without
WS_HSCROLLorWS_VSCROLL - the caller selected
SB_HORZwhen only a vertical bar exists - a custom control paints its own scrolling UI instead of using USER32 scroll bars
- styles were changed after creation and the cached assumption was not updated
- the supplied handle identifies a parent, child, or replacement window rather than the intended control
Telemetry to add
Record the API, HWND, class name, style and extended-style bits, selected bar constant, visibility state, and whether the target is a dedicated SCROLLBAR control. Include the control-generation number if the UI rebuilds content. Log the scroll range and page size only after the presence check succeeds.
Diagnostic sequence
Inspect the live window styles rather than the creation template. For a standard window bar, verify the relevant scroll style and query the same SB_* selector used by the failing call. For a scroll-bar control, ensure the handle points to that control and use SB_CTL where required.
Determine whether the application framework intentionally uses logical scrolling without native bars. List views, rich edit controls, and custom canvases can expose higher-level scrolling interfaces that should be used instead of forcing generic scroll-bar APIs onto their internal windows.
Recovery and prevention
Create or show the required bar through the documented control path, choose the correct selector, or skip the operation when the UI design has no native bar. Keep layout state and scroll capability in the same component so background code does not infer bar existence from content size alone.
How it differs from range errors
ERROR_INVALID_SCROLLBAR_RANGE means a scroll bar exists but the requested numeric range is invalid. Error 1447 means the selected bar itself is not available on the target.
Example
A reusable helper always calls GetScrollInfo(hwnd, SB_HORZ, ...). One screen enables only WS_VSCROLL, so the horizontal query reports 1447. Passing the orientation from the owning view instead of hard-coding it makes the helper valid for both layouts.
References
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