Interoperability Warnings

Interoperability warnings support interacting with COM clients.

In This Section

• Auto layout types should not be ComVisible

• Avoid int64 arguments for VB6 clients

• Avoid non-public fields in ComVisible value types

• Avoid overloads in ComVisible interfaces

• Avoid static members in ComVisible types

• Call GetLastError immediately after pinvoke

• Com registration methods should be matched

• Com registration methods should not be visible

• Com visible type base types should be ComVisible

• Com visible types should be creatable

• Declare PInvokes correctly

• Do not use AutoDual ClassInterfaceType

• Mark boolean pinvoke arguments with MarshalAs

• Mark ComSource interfaces as IDispatch

• PInvoke entry points should exist

• PInvokes should not be visible