FILE_OPEN_CONTROL_SUB_DIR_OPEN</CODE>
    and <CODE>MSG_FILE_OPEN_CONTROL_SUB_DIR_CLOSE</CODE> and set the 
    extra triggers not-usable or usable.</P>
</UL>

<IMG SRC="subdir.gif" ALT="[FileOpenControl screen shot]" WIDTH="648" HEIGHT="204">
<P CLASS="figTitle"><STRONG>Figure:</STRONG> The "Close" trigger is covering another trigger in the same slot.</P>

<P>The following code snippets show how an application might 
   carry out these tasks.</P>

<PRE>
/* Put the FileOpenControl on the necessary notificat