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IWMSContext.GetAndQueryIUnknownValue (C#)

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The GetAndQueryIUnknownValue method retrieves a specified object.

void IWMSContext.GetAndQueryIUnknownValue(
  string pstrName,
  int lNameHint,
  ref Guid riid,
  out object pResult,
  int lOptions
);

Arguments

string specifying the name portion of the name-value pair in the context.

int containing an optional key that can be used to more efficiently access a value.

Reference to a Guid identifying the requested object.

Reference to the specified object.

Reserved for future use.

Return Value

This method does not return a value.

If this method fails, it throws an exception.

Number

Description

0x8002000B

The property specified by the pstrName parameter could not be found.

0x80020005

The data type of the property specified by the pstrName parameter is not VT_UNKNOWN.

0x80004003

pResult is null.

Example

Guid ServerGuid = typeof(IWMSServer).GUID;
object            pServer;

try
{          
    pServerContext.GetAndQueryIUnknownValue(WMSDefines.WMS_SERVER,
                                            WMSDefines.WMS_SERVER_ID,
                                            ref ServerGuid,
                                            out pServer,
                                            0);
}
catch( Exception e )
{
    // TODO: Handle exceptions.
}

Requirements

Reference: Add a reference to Microsoft.WindowsMediaServices.

Namespace: Microsoft.WindowsMediaServices.Interop.

Assembly: Microsoft.WindowsMediaServices.dll.

Library: WMSServerTypeLib.dll.

Platform: Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition; Windows Server 2008.

See Also

Concepts

IWMSContext Object (C#)