Problem compiling simple code examples

This is a discussion on Problem compiling simple code examples within the Windows Programming forums, part of the Platform Specific Boards category; Okay I am new to Windows programming in C++, so I am looking at various tutorials on the internet in ...

  1. #1
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    Problem compiling simple code examples

    Okay I am new to Windows programming in C++, so I am looking at various tutorials on the internet in order to learn about it. My problem is that none of the code examples so far have been compilable in Visual Studio, but compile just fine in Bloodshed Dev C++. I prefer using VS due to its much much nicer UI.

    Anyway.. An example would be this error: "cannot convert parameter 2 from 'const char[28]' to 'LPCWSTR' ". This is the case in this line of code:
    Code:
    MessageBox(NULL, "Window Registration Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
    which is taken from this example http://www.winprog.org/tutorial/simple_window.html

    Obviously it always happens when I try to implicitly convert a const char type to a LPCWSTR type (whatever that is). Anyone have a solution to this problem?


    Thanks in advance

  2. #2
    Sweet
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    Are you trying to compile in UNICODE? Cause that could cause some problems. Try putting TEXT("Text Here") around your strings.

  3. #3
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    Hey thanks man that actually worked

    I disabled the unicode, and switched to something called "multi-byte character set" and I am now able to compile. Thanks a lot for your help

  4. #4
    Sweet
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    Your welcome!

  5. #5
    Deathray Engineer MacGyver's Avatar
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    FYI, the LPCWSTR type means:

    Long
    Pointer
    to a
    Constant
    Wide
    STRing


  6. #6
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    hehe okay :-) ehhh now you all probably laugh your asses off, but what is a wide string? hehe... Windows has lots of weird types, but I'm looking forward to delve deeper into the universe and learn what it's all about.

  7. #7
    chococoder
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    Wide String is a String of 16 bit characters, iow, Unicode.
    As compared to a regular string which is just a char array.

  8. #8
    int x = *((int *) NULL); Cactus_Hugger's Avatar
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    Wide String is a String of 16 bit characters, iow, Unicode.
    As compared to a regular string which is just a char array.
    A regular char array can be Unicode.
    Specifically, I believe Window's wide strings are UTF-16. A char array is usually ASCII, but it could just as well be UTF-8. You just have to know what encoding your string uses, otherwise, it's just data.

    Google should help you locate some reference material / tutorials on Unicode in Windows.
    Last edited by Cactus_Hugger; 08-14-2007 at 07:42 AM.
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