/c_ext

midl /c_ext

This switch is obsolete with the current version (3.0) of the MIDL compiler. However, using the switch will not generate a compiler error, so you do not have to remove references to /ms_ext or /c_ext from an existing makefile.

The following features are now available by default:

Many existing header files define types with qualifiers, such as far and stdcall, that are not part of the DCE IDL. DCE IDL compilers (and the MIDL compiler in DCE-compatibility mode) generate errors when they attempt to process these qualifiers. The MIDL compiler allows you to compile IDL files that contain these qualifiers. The type qualifiers do not affect the way the data is transmitted on the network.

You can omit directional attributes (in, out).

The following C-language extensions are supported in default mode:

Bit fields in structures and unions

Comments that start with two slash characters ( // )

External declarations

Procedures with ellipses in the parameter list

On 32-bit platforms, int is a native 32-bit base type. On 16-bit platforms, int is recognized but is not a remotable type

Type void * that is not used in remote operations

Type qualifiers, including the form with the ANSI-conformant prefix, contain two underscore characters: _ _cdecl, cdecl, _ _const, const, _ _export, export, _ _far, far, _ _loadds, loadds, _ _near, near, _ _pascal, pascal, _ _stdcall, stdcall, _ _volatile, and volatile.

For more information about declaration qualifiers, see your Microsoft C/C++ documentation.