ject's instance chunk. It is typically used to allocate space for a master part or to resize the master part to zero (as when the Vis part of a visible object is removed in <CODE>
MSG_VIS_CLOSE</CODE>
). This routine must be passed the following three parameters:</P>
<DL>
<DT>
<CODE>
obj</CODE>
</DT><DD>The optr of the object whose master part is to be resized.</DD>
<DT>
<CODE>
masterOffset</DT><DD>
</CODE>
The offset into the object's instance chunk where the offset to the master part is kept (this is the 