Windows / Win32 / MIDL2221

MIDL2221

The documentation lists this name without a value.

Documented in Win32

Compiler Errors

field of a nonencapsulated union cannot be another nonencapsulated union Unions that are transmitted as part of a remote procedure call require an associated data item, the discriminant, that selects the union arm. Unions nested in other unions do not offer a discriminant; as a result, they cannot be transmitted in this form. Create a structure that consists of the union and its discriminant.