wchar_t attribute
The wchar_t keyword designates a wide-character type.
wchar_t identifier-name;
-
identifier-name
-
Specifies a valid MIDL identifier. Valid MIDL identifiers consist of up to 31 alphanumeric and/or underscore characters and must start with an alphabetic or underscore character.
The wchar_t type is a 16-bit integer which represents a UTF-16 code unit.
The underlying type of wchar_t is determined by the C or C++ compiler. For C++, you can choose the underlying type with the /Zc:wchar_t compiler option.
The MIDL compiler allows redefinition of wchar_t, but only if it is defined as an unsigned short. If you do redefine wchar_t in this way, then you must use the /Zc:wchar_t- compiler option when compiling as C++ to avoid a C++ type redefinition conflict for wchar_t. Redefining wchar_t is supported only for compatibility reasons and is not recommended.
The wide-character type is one of the predefined types of MIDL. The wide-character type can appear as a type specifier in const declarations, typedef declarations, general declarations, and function declarators (as a function return type specifier and as a parameter-type specifier). For the context in which type specifiers appear, see Interface Definition (IDL) File.
The [string] attribute can be applied to a pointer or array of type wchar_t.
Use the L character before a character or a string constant to designate the wide character type constant.