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 |
|---|---|
|
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 |