MIDL2125
The documentation lists this name without a value.
Documented in Win32
use of "int" needs /c_ext MIDL is a strongly typed language. All parameters transmitted over the network must be derived from one of the MIDL base types. The type int is not defined as part of MIDL. Transmitted data must include a size specifier: small , short , or long . Data that is not transmitted over the network can be included in an interface; use the /c_ext switch.