Example of a poor-man's WinMain-to-main entry point adapter.

main.c

/*=========================================================================*/
int WINAPI WinMain(                 //Windows program entry point
    HINSTANCE           hInstance,  //handle to this application
    HINSTANCE           hPrevInstance,
                                    //handle to previous application
    LPTSTR              lpCmdLine,  //executed command
    int                 nCmdShow    //window display options
) {                                 //program exit status

    //local variables
    int                 argc;       //number of parsed arguments
    char**              argv;       //list of parsed arguments
    int                 i;          //index/counter
    int                 length;     //lengths of strings
    int                 result;     //result of program execution
    LPWSTR*             strings;    //list of parsed arguments

    //retrieve parsed arguments from Windows-style invocation
    strings = CommandLineToArgvW( GetCommandLineW(), &argc );

    //allocate string pointers for argument list
    argv = calloc( argc, sizeof( char* ) );

    if( argv == NULL ) {
        LocalFree( strings );
        return 1;
    }

    //convert each argument from unicode to multibyte
    for( i = 0; i < argc; ++i ) {
        length = wcslen( strings[ i ] );
        argv[ i ] = calloc( ( length + 1 ), 1 );
        wcstombs( argv[ i ], strings[ i ], length );
    }

    //execute the main program
    result = main( argc, ( const char** ) argv );

    //release the allocated argument strings
    for( i = 0; i < argc; ++i ) {
        free( argv[ i ] );
    }

    //release allocated memory
    free( argv );
    LocalFree( strings );

    //return the main program's exit status
    return result;
}