How to: Create Verifiable C++ Projects (C++/CLI)

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06/05/2017

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The latest version of this topic can be found at How to: Create Verifiable C++ Projects (C++/CLI).

Visual C++ application wizards do not create verifiable projects, but projects can be converted to be verifiable. This topic describes how to set project properties and modify project source files to transform your Visual C++ projects to produce verifiable applications.

Compiler and Linker Settings

By default, .NET projects use the /clr compiler flag and configure the linker to target x86 hardware. For verifiable code, you must use the /clr:safe flag, and you must instruct the linker to generate MSIL instead of native machine instructions.

To change the compiler and linker settings

Display the project Property Page. For more information, see How to: Open Project Property Pages.
On the General page under the Configuration Properties node, set the Common Language Runtime Support property to Safe MSIL Common Language Runtime Support (/clr:safe).
On the Advanced page under the Linker node, set the CLR Image Type property to Force safe IL image (/CLRIMAGETYPE:SAFE).

Removing Native Data Types

Because native data types are non-verifiable, even if they are not actually used, you must remove all header files containing native types.

Note

The following procedure applies to Windows Forms Application (.NET) and Console Application (.NET) projects.

To remove references to native data types

Comment out everything in the Stdafx.h file.

Configuring an Entry Point

Because verifiable applications cannot use the C run-time libraries (CRT), they cannot depend on the CRT to call the main function as the standard entry point. This means that you must explicitly provide the name of the function to be called initially to the linker. (In this case, Main() is used instead of main() or _tmain() to indicate a non-CRT entry point, but because the entry point must be specified explicitly, this name is arbitrary.)

Note

The following procedures apply to Console Application (.NET) projects.

To configure an entry point

Change _tmain() to Main() in the project's main .cpp file.
Display the project Property Page. For more information, see How to: Open Project Property Pages.
On the Advanced page under the Linker node, enter Main as the Entry Point property value.

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