CType in VB.NET with dynamic second parameter (type)

In VB.NET CType can be used to convert one type to another.

CType(expression,type)

I have the "expression" stored in an instance object class, say "objExp". I have the "type" stored in an instance of Type class, say"objType".

I am trying CType(objExp, objType) I am getting compile error, how should I go about it ? "objType" is fetched and assigned at runtime.