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<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="GENERATOR" content="Mozilla/4.5 [en] (X11; I; Linux 2.0.35 i586) [Netscape]"> <title>LST - Cursor - Add B</title> </head> <body bgcolor="#FFFFFF"> <center><b><font face="Arial,Helvetica"><font size=+1>LST</font></font></b> <br><b><font face="Arial,Helvetica"><font size=+1>Cursor</font></font></b> <br><b><font face="Arial,Helvetica"><font size=+1>Add B</font></font></b> <hr WIDTH="100%"> <br><img SRC="InternalStructure2.gif" ALT="LST - Cursor - Add B" BORDER=0 height=247 width=431></center> <hr WIDTH="100%"> <br><b><font face="Arial,Helvetica">Description</font></b> <p><font face="Arial,Helvetica">This diagram depicts a cursor (B) which is based upon the root list (A). The cursor was created with a call to lstOpenCursor(). This cursor contains a subset of items from the base list because a filter function was provided. Cursors can be manipulated using the same functions as a normal list and they are closed with a simple call to lstClose().</font> <p><font face="Arial,Helvetica">The pData in cursor items refer directly to the corresponding item in the root list. Reference counters are increased in the base list (A) and in each item. This prevents underlying data from being deleted while a derived cursor is still in use.</font> <p><b><font face="Arial,Helvetica">Related Functions</font></b> <p><font face="Arial,Helvetica">lstOpenCursor</font> <br> <hr> <center><a href="InternalStructure.html"><img SRC="back.gif" ALT="[Back]" BORDER=0 height=32 width=32></a><a href="InternalStructure3.html"><img SRC="next.gif" ALT="[Next]" BORDER=0 height=32 width=32></a> <p>Page 2 of 9</center> </body> </html>
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