<span class="symbol"><A NAME="ref_62_7" HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#ref_60_13">Typ</A></span> : <A HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#ref_50_9">User_Defined_Field_Type_With_Choice</A>) <b>return</b> Boolean
<b>is</b> <b>abstract</b>;
<span class="comment"><EM>-- If True is returned, the function successfully generated a next</EM></span>
<span class="comment"><EM>-- value into the fields buffer.</EM></span>
<b>function</b> <span class="symbol"><A NAME="ref_67_13">Previous</A></span>
<span class="symbol"><A NAME="ref_62_7" HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#ref_60_13">Typ</A></span> : <A HREF="terminal_interface-curses-forms-field_types-user-choice__ads.htm#ref_50_9">User_Defined_Field_Type_With_Choice</A>) <b>return</b> Boolean
<b>is</b> <b>abstract</b>;
<span class="comment"><EM>-- If True is returned, the function successfully generated a next</EM></span>
<span class="comment"><EM>-- value into the fields buffer.</EM></span>
<b>function</b> <span class="symbol"><A NAME="ref_67_13">Previous</A></span>