Lotus Notes C++ API - No platform specified

When compiling my DLL project in Visual Studio, an error is thrown: No platform specified.

I’ve played around with some options in Build > Configuration Manager. Tried pointing to Win32 and x64 with no luck but I have little to no clue what I’m doing. Any help is appreciated.

Subject: Solved

Solved by appending W32 to the Preprocessor Definitions in the Project Properties of Visual Studio under Configuration Properties > C/C++ > Preprocessor > Preprocessor Definitions.