NAME
        OpenLibrary -- gain access to a library

   SYNOPSIS
        library = OpenLibrary(libName, version)
        D0                    A1       D0

        struct library *openlibrary(strptr, ulong);

   FUNCTION
        This function returns a pointer to a library that was previously
        installed into the system.  If the requested library is exists, and
        if the library version is greater than or equal to the requested
        version, then the open will succeed.

        The library may exist in memory, or on disk; this is transparent to
        the OpenLibrary caller.  Only Processes are allowed to call
        OpenLibrary (since OpenLibrary may in turn call dos.library).

        A full path name for the library name is legitimate.  For example
        "wp:libs/wp.library".  This allows the use of custom libraries
        without requiring the user to copy the library into the system's
        LIBS: directory.

   NOTES
        All calls to OpenLibrary should have matching calls to CloseLibrary!

        Libraries on disk cannot be opened until after DOS has been
        started.

        As of V36 tasks can safely call OpenLibrary, though DOS may open
        system requesters (e.g., asking the user to insert the Workbench
        disk if LIBS: is not online).  You must call this function from a
        DOS process if you want to turn off dos requesters.

   INPUTS
        libName - the name of the library to open

        version - the version of the library required.

   RESULTS
        library - a library pointer for a successful open, else zero

   BUGS
        AmigaDOS file names are not case sensitive, but Exec lists are. If
        the library name is specified in a different case than it exists on
        disk, unexpected results may occur.

        Prior to V36, tasks could not make OpenLibrary calls requiring disk
        access (since tasks are not allowed to make dos.library calls).
        Now OpenLibrary is protected from tasks.

        The version number of the resident tag in disk based library must
        match the version number of the library, or V36 may fail to load it.

   SEE ALSO
        closelibrary()