Format of a C Decorated NameĀ 

The form of decoration for a C function depends on the calling convention used in its declaration, as shown below.

Calling convention Decoration

__cdecl (the default)

Leading underscore (_)

__stdcall

Leading underscore (_) and a trailing at sign (@) followed by a number representing the number of bytes in the parameter list

__fastcall

Same as __stdcall, but prepended by an at sign instead of an underscore

See Also

Reference

Using Decorated Names