Public Delegate Sub FormTeacher.UpdateVideoCallback( _
   ByVal im As Image, _
   ByVal tag As String _
) 

Dim instance As New UpdateVideoCallback(AddressOf HandlerMethod)

public delegate void FormTeacher.UpdateVideoCallback( 
   Image im,
   string tag
)

public: __gc __delegate void FormTeacher.UpdateVideoCallback( 
   Image* im,
   string* tag
)

public delegate void FormTeacher.UpdateVideoCallback( 
   Image^ im,
   String^ tag
)