/Wp64 (Detect 64-Bit Portability Issues)
/Wp64 detects 64-bit portability problems on types that are also marked with the __w64 keyword. /Wp64 is off by default in the Visual C++ 32-bit compiler and on by default in the Visual C++ 64-bit compiler.
Variables of the following types are tested on a 32-bit operating system as if they were 64 bits:
To set this compiler option in the Visual Studio development environment
- Open the project's Property Pages dialog box. For details, see Setting Visual C++ Project Properties.
- Click the C/C++ folder.
- Click the General property page.
- Modify the Detect 64-bit Portability Issues property.
To set this compiler option programmatically