Enum CallingConvention Path C++ Link System.Runtime.InteropServices.CallingConvention, mscorlib underlying int32 mscorlib.dll Values 5 NameValueHex Winapi10x01Cdecl20x02StdCall30x03ThisCall40x04FastCall50x05 Used by 2types with a member, parameter or interface of this type DllImportAttributeUnmanagedFunctionPointerAttribute // System.Runtime.InteropServices.CallingConvention, mscorlib enum class CallingConvention : int32 { Winapi = 1, Cdecl = 2, StdCall = 3, ThisCall = 4, FastCall = 5, };