+
+ <STRONG>bool</STRONG> <STRONG>data_ahead(const</STRONG> <STRONG>FORM</STRONG> <STRONG>*</STRONG><EM>form</EM><STRONG>);</STRONG>
+ <STRONG>bool</STRONG> <STRONG>data_behind(const</STRONG> <STRONG>FORM</STRONG> <STRONG>*</STRONG><EM>form</EM><STRONG>);</STRONG>