How to Declare a external COM component Interface....?

[dhilip81]

Hi Genius.........
i have struggled with some problems please help me


m creating a COM component Instance like this for supporting multiple version of COM components

Private _cmObjct As Object
    Public Property CreatingInstances() As Object
        Get
            Dim _typePs As Type = Type.GetTypeFromProgID("SecureTronics.Application")
            If Not _typePs Is Nothing Then
                If _cmObjct Is Nothing Then _cmObjct = Activator.CreateInstance(Type.GetTypeFromProgID("SecureTronics.Application"))
            End If
            Return _cmObjct
        End Get
        Set(ByVal value As Object)
            _cmObjct = value
        End Set
    End Property

it's really fine to working me with multiple versions.



but this component have some Multiple Interfaces...,Properties...,Methods...,Classes... and so on...

what my question is if i reference this dll file i can declare a variable with this component Interface
like

Dim _ssdObj as SecureTronics.SSDP

at the same time how to declare this method without referenced dll

SSDP is an interface so how to declare this interface for my usage
is this Correct ...?

Dim d as Object = Activator.CreateInstance(Type.GetTypeFromProgID("SecureTronics.SSDP"))