IWMSContext.SetIUnknownValue (Visual Basic .NET)

  • Article

The SetIUnknownValue method specifies an IUnknown value for the context.

IWMSContext.SetIUnknownValue(  pstrName As String,
  lNameHint As Int32,
  pValue As Object,
  lOptions As Int32
)

Arguments

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

Int32 containing an optional key that can be used to more efficiently access a value.

Object containing the value.

Reserved for future use.

Return Value

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

Dim Context As IWMSContext
Dim pUnknown As IntPtr
Dim pMyClass As CMyUserDefinedClass

Try
    m_ClassFactory.AllocIWMSContext(GetType(IWMSContext).GUID, _
                                 WMS_CONTEXT_TYPE.WMS_USER_CONTEXT_TYPE, _
                                 pUserContext, pUnknown)
    Context = Marshal.GetTypedObjectForIUnknown(pUnknown, _
                                                GetType(IWMSContext))

    Context.SetIUnknownValue("MyClassEntry",  _
                    WMS_CONTEXT_HINT_CONSTANTS.WMS_CONTEXT_NO_NAME_HINT, _
                    pMyClass, 0)

Catch e As Exception
    ' TODO: Handle exceptions.
End Try

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 (Visual Basic .NET)