NAME
        OpenResource -- gain access to a resource

   SYNOPSIS
        resource = OpenResource(resName)
        D0                      A1

        aptr openresource(strptr);

   FUNCTION
        This function returns a pointer to a resource that was previously
        installed into the system.

        There is no CloseResource() function.

   INPUTS
       resName - the name of the resource requested.

   RESULTS
        resource - if successful, a resource pointer, else NULL