CODEWITHSUNDEEP
c++windowsmacros
user198729
user198729

Reputation: 63626

What's the point of this kind of macros?

#define NAME(x) TEXT(x)
#define TEXT(quote) __TEXT(quote)   // r_winnt
#define __TEXT(quote) quote         // r_winnt

The above is from winNT.h, isn't NAME("Virtual Cam") the same as "Virtual Cam",what's the point to use this macro?

Upvotes: 6

Views: 3617

Answers (2)

Naveen
Naveen

Reputation: 73433

__TEXT macro expansion is selected based on whether UNICODE flag is defined or not. If not it just expands to quote else it will append L to the quote so that it becomes L"Virtual Cam" . This string is interpreted as a wide char string.

Upvotes: 6

Puppy
Puppy

Reputation: 146900

Depends on if your system is #defined to use Unicode. Then it will automatically change the literal for you to be a wide literal instead of a char literal.

Upvotes: 1

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