vities will not conflict. The way they do that is to use synchronization routines to get control of a block. <CODE>
HandleV()</CODE>
 is part of one set of synchronization routines.</P>
<P>
If a block is being accessed via these synchronization routines, then a thread will not access a block until it has &quot;grabbed&quot; it with <CODE>
<A HREF="../../CRef/Routines/R_55.htm#IX_HandleP()">HandleP()</A></CODE>
 or <CODE>
<A HREF="../../CRef/Routines/R_6e.htm#IX_MemPLock()">MemPLock()</A></CODE>
. When a thr