ICameraControl::getRange_Zoom method (vidcap.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The getRange_Zoom method returns the range of zoom levels supported by the camera.
Syntax
HRESULT getRange_Zoom(
[out] long *pMin,
[out] long *pMax,
[out] long *pSteppingDelta,
[out] long *pDefault,
[out] long *pCapsFlag
);
Parameters
[out] pMin
Receives the minimum zoom.
[out] pMax
Receives the maximum zoom.
[out] pSteppingDelta
Receives the smallest step between settings.
[out] pDefault
Receives the default zoom.
[out] pCapsFlag
Receives one or more flags. See CameraControlFlags.
Return value
Returns an HRESULT value.
Remarks
For information about calculating magnification from zoom level, see ICameraControl::get_FocalLengths.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP with SP2 [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | vidcap.h |
| Library | Strmiids.lib |