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IWMSContext.SetIUnknownValue (C#)

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IWMSContext.SetIUnknownValue (C#)

The SetIUnknownValue method specifies an IUnknown value for the context.

Syntax

Parameters

pstrName

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

lNameHint

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

pValue

object containing the value.

lOptions

Reserved for future use.

Return Values

This method does not return a value.

If this method fails, it throws an exception.

Number Description
0x80070057 The pstrName parameter is null.
0x8007000E Could not allocate memory for the value.

Example Code

Guid ContextGuid = typeof(IWMSContext).GUID;
IWMSContext         Context;
IntPtr              pUnknown;
CMyUserDefinedClass pMyClass;

try
{          
    m_ClassFactory.AllocIWMSContext(ref ContextGuid,
                                   WMS_CONTEXT_TYPE.WMS_USER_CONTEXT_TYPE,
                                   pUserContext, out pUnknown);
    Context = (IWMSContext)Marshal.GetTypedObjectForIUnknown(pUnknown,
                                                     typeof(IWMSContext));
            
    Context.SetStringValue(WMSDefines.WMS_CONTENT_DESCRIPTION_TITLE,
                           WMSDefines.WMS_CONTENT_DESCRIPTION_TITLE_ID,
                           "My Title", 0);
    Context.SetLongValue(WMSDefines.WMS_CONTENT_DESCRIPTION_NO_SKIP,
                         WMSDefines.WMS_CONTENT_DESCRIPTION_NO_SKIP_ID,
                         1, 0);

    Context.SetIUnknownValue("MyClassEntry",
                      WMS_CONTEXT_HINT_CONSTANTS.WMS_CONTEXT_NO_NAME_HINT,
                      (object)pMyClass, 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

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