1. A computerized system comprising: an operating system having an interface including a hosting mechanism that provides for hosting of at least one control having support for the IUnknown interface within at least one window of the operating system; and at least one program operating in the operating system and utilizing the interface to host at least one control having support for the IUnknown interface within said at least one window, said utilizing including intercepting a function call to provide for hosting of the at least one control.