How to convert #defined string literal to a wide string literal? [duplicate]

Answer 1

Token pasting needs an additional level of indirection to deal properly with macros used as operands. Try something like:

#define PASTE(x, y) x##y
#define MAKEWIDE(x) PASTE(L,x)

Answer 2

This will work just fine:

#define B "1234\0"
#define LB L"" B