[Reference] Double Thunking & __clrcall Calling Convention

Microsoft Docs

Visual C++ Documentation

Visual C++ in Visual Studio

C++ Language Reference

Microsoft-Specific Modifiers

Calling Conventions

Argument Passing and Naming Conventions

__clrcall

.NET Programming with C++/CLI (Visual C++)

Native and .NET Interoperability

Mixed (Native and Managed) Assemblies

Double Thunking (C++)

CallingConvention Enumeration

C++/CLI and mixed mode programming

Speed up mixed mode apps with __clrcall