autorun app

This is a discussion on autorun app within the C++ Programming forums, part of the General Programming Boards category; Hey all, Hammer gave me this code to use in a small app that will be used in a cd ...

  1. #1
    5|-|1+|-|34|) ober's Avatar
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    autorun app

    Hey all,

    Hammer gave me this code to use in a small app that will be used in a cd autorun.inf file. I can get it to compile, but it errors out when I try to build it with this error:

    LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
    Debug/AutoStart.exe : fatal error LNK1120: 1 unresolved externals
    Code:
    #define STRICT
    #include <Windows.h>
    /* */
    int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR pCmdLine, int nCmdShow)
    {
    int i;
    for (i = 1; i < __argc; i ++)
    {
    if ((int) ShellExecute(NULL, NULL, __argv[i], NULL, NULL, SW_SHOWNORMAL) <= 32)
    {// Error trying to run default browser, tell user
    CHAR sz[1024];
    wsprintf(sz, TEXT("Error openning %s on CD-ROM disc."), __argv[i]);
    MessageBox(NULL, sz, TEXT("ShellExecute"), MB_OK | MB_ICONWARNING);
    }
    }
    return(0);
    }
    help?

  2. #2
    5|-|1+|-|34|) ober's Avatar
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    I'm new to c++, but I'm wondering... do I need a Main to call that API??

  3. #3
    Registered User Codeplug's Avatar
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    This belongs in the Windows development forum.

    Your compiler expects main() to be the program's entry point, not WinMain().

    Just change it to
    Code:
    int main(int argc,char *argv[])
    Be sure to changes references to "__argc" and "__argv" to "argc" and "argv".

    gg

  4. #4
    End Of Line Hammer's Avatar
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    If you do that it will become a console app, which is a bit yak for what you want.

    Better just compile it as a windows app in the first place. What compiler are you using?
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  5. #5
    5|-|1+|-|34|) ober's Avatar
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    sweet... thanks. Sorry about posting in the wrong forum.. I wasn't sure where to put it.

  6. #6
    5|-|1+|-|34|) ober's Avatar
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    MSVC 6

    I didn't know you had to compile it differently.

  7. #7
    End Of Line Hammer's Avatar
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    They'll be an option in the compile settings to create a console or a GUI app. You need GUI.

    I can't guide you any further with MSVC6, I'm one of the few people in the world that doesn't have it But I'm sure someone else will step in and advise.
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  8. #8
    Registered User Codeplug's Avatar
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    I found it.....(finally)

    http://msdn.microsoft.com/library/de....SUBSYSTEM.asp

    You probably won't have to create a new project. Just go to Project->Settings->Link->(Category)General, down in the Project Options edit box, you should see "/subsystem:console". Change "console" to "windows".

    I did that to my console app and got:

    LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16

    gg

  9. #9
    RoD
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    go to new---win32 application (should be right above win32 console application) ---select standard (second option) and put the code into that project.

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