Compiler Error C2002
The multibyte-character constant is not valid.
To fix by checking the following possible causes
The wide-character constant contains more bytes than expected.
The standard header STDDEF.h is not included.
Wide characters cannot be concatenated with ordinary string literals.
A wide-character constant must be preceded by the character 'L':
For Microsoft C++, the text arguments of a preprocessor directive must be ASCII. For example, the directive, #pragma message(L"string"), is not valid.