How to convert const char* to const WCHAR*

Question

I have something like this:

if(GetFileAttributesW("C:\\Directory")!="INVALID_FILE_ATTRIBUTES") {...}

I get error: cannot convert 'const char*' to 'const WCHAR*' for argument '1' to 'DWORD GetFileAttributesW(const WCHAR*)'

How to convert const char* to const WCHAR*?

Answer 1

Don't use GetFileAttributesW, use GetFileAttributes. Add _T to all const strings, and use _TCHAR*. And INVALID_FILE_ATTRIBUES is definitely not a string...

if(GetFileAttributes(_T("C:\\Directory"))!= INVALID_FILE_ATTRIBUTES ) 
 {...}

See Unicode Programming Summary.