a type problem (TCHAR, LPCWSTR)

Hi, I got a small situation that I just can't figure out

Code:

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hFile = CreateFile ((LPCWSTR) bla ,                // this parameter bothers me
                      GENERIC_READ,          // open for reading
                      FILE_SHARE_READ,...

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This is a win API, the name kinda says it all, and the first parameter is the name of the file and the type as you can see is LPCWSTR, now, in C everything works fine if you simply type in "d:\sdaf\gfasd.txt" or whichever file you want to access, all neat and fine, but in C++ I got in to a whole lota trouble when I did this, the compiler gives me an error

//Error 2 error C2664: 'CreateFileW' : cannot convert parameter 1 from 'const char [7]' to 'LPCWSTR'

And if I typecast it then I get a bug, cuz the function won't open the file, stating it does not exist.

Then another thing I saw was that an example I was looking used a TCHAR *argv[]
and took argv[1] into the first parameter and everything worked fine, then when I tried to decleare TCHAR *mystring, I used the sprintf_s and again it can't find the file, and belive me on this one, it is there. + the same process when I tried with the LPCWSTR.

I know C++ is pretty tough with typecasting, but sheeshh:D

Any ideas, solutions would be great, thanks.

PS: anything unclear?? just say (cuz I'm lousy at explaining things)

It means - ou compiling your C++ code as UNICODE
Add L before the string literals
L"d:\sdaf\gfasd.txt"

or use TEXT macro to be able to compile both ways
TEXT("d:\sdaf\gfasd.txt")

Moved to Windows programming forum.

thnx Vart, works well.

C++ is strict on typecasting, yes, because you are trying to pass incorrect type.
In your project, you have unicode defined, yet you are using ANSI-type C-style functions.
You can look for "TCHAR" specific functions. They'll work fine.
Never, ever, cast something unless you know what you're doing. In this case, you don't know what you're doing, so don't cast it, okay? :)

no problemo, :P & tnx

Quote:

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Originally Posted by Crazed

Code:

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hFile = CreateFile ((LPCWSTR) bla ,                // this parameter bothers me
                      GENERIC_READ,          // open for reading
                      FILE_SHARE_READ,...

---

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try

Code:

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hFile = CreateFile (L"Somefile.ext",                // this parameter bothers me
                      GENERIC_READ,          // open for reading
                      FILE_SHARE_READ,...

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