We create an application that is an ActiveX component. We were unable to initiate VideoOS.Platform.SDK.UI.dll in our component. Tell me how to properly use VideoOS.Platform.SDK.UI. Thank you. Sorry for my English 
You need to be aware of the dependent dll’s and supply these dll’s also. In the MIP Documentation please see - “.NET Library Initialization”
I hope this is sufficient for you, I have no experience converting these components to activeX.