IWMRegisteredDevice::IsValid method (wmsdkidl.h)

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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.

Return code Description
S_OK
The method succeeded.

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

Requirement Value
Minimum supported client Windows XP [desktop apps only],Windows Media Format 9.5 SDK
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header wmsdkidl.h (include Wmsdk.h)
Library WMStubDRM.lib

See also

IWMRegisteredDevice Interface