IWMRegisteredDevice::IsValid method (wmsdkidl.h)

[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The IsValid method retrieves the validation status of the device.

Syntax

HRESULT IsValid(
  [out] BOOL *pfValid
);

Parameters

[out] pfValid

Address of a variable that receives the validation status of the device. TRUE indicates that the device is valid. FALSE indicates that the device is not valid and needs to be revalidated before it can be used.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Remarks

To receive data, a device must be opened, validated, and approved.

You can find out whether the device is open by calling IsOpened. To open the device call Open.

A device is validated by performing proximity detection. For more information, see the IWMProximityDetection interface.

Call the IsApproved method to determine whether the device is approved. To approve the device, call the Approve method.

Requirements

See also

IWMRegisteredDevice Interface