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  * @Id: form_field_new.3x,v 1.16 2007/06/02 20:40:07 tom Exp @
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<H1>form_field_new 3x</H1>
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<STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>                                   <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>


</PRE>
<H2>NAME</H2><PRE>
       <STRONG>form_field_new</STRONG> - create and destroy form fields


</PRE>
<H2>SYNOPSIS</H2><PRE>
       <STRONG>#include</STRONG> <STRONG>&lt;form.h&gt;</STRONG>
       FIELD *new_field(int height, int width,
                        int toprow, int leftcol,
                        int offscreen, int nbuffers);
       FIELD *dup_field(FIELD *field, int toprow, int leftcol);
       FIELD *link_field(FIELD *field, int toprow, int leftcol);
       int free_field(FIELD *field);


</PRE>
<H2>DESCRIPTION</H2><PRE>
       The  function <STRONG>new_field</STRONG> allocates a new field and initial-
       izes it from the parameters given: height, width,  row  of
       upper-left  corner,  column  of  upper-left corner, number
       off-screen rows, and number of additional working buffers.

       The  function  <STRONG>dup_field</STRONG> duplicates a field at a new loca-
       tion.  Most attributes (including current contents,  size,
       validation  type, buffer count, growth threshold, justifi-
       cation, foreground, background,  pad  character,  options,
       and  user pointer) are copied.  Field status and the field
       page bit are not copied.

       The function <STRONG>link_field</STRONG> acts like <STRONG>dup_field</STRONG>, but  the  new
       field  shares  buffers with its parent.  Attribute data is
       separate.

       The function <STRONG>free_field</STRONG>  de-allocates  storage  associated
       with a field.


</PRE>
<H2>RETURN VALUE</H2><PRE>
       The function, <STRONG>new_field</STRONG>, <STRONG>dup_field</STRONG>, <STRONG>link_field</STRONG> return <STRONG>NULL</STRONG>
       on error.  They set errno according to their success:

       <STRONG>E_OK</STRONG> The routine succeeded.

       <STRONG>E_BAD_ARGUMENT</STRONG>
            Routine detected an incorrect or  out-of-range  argu-
            ment.

       <STRONG>E_SYSTEM_ERROR</STRONG>
            System error occurred, e.g., malloc failure.

       The function <STRONG>free_field</STRONG> returns one of the following:

       <STRONG>E_OK</STRONG> The routine succeeded.

       <STRONG>E_BAD_ARGUMENT</STRONG>
            Routine  detected  an incorrect or out-of-range argu-
            ment.

       <STRONG>E_CONNECTED</STRONG>
            field is connected.


</PRE>
<H2>SEE ALSO</H2><PRE>
       <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>.


</PRE>
<H2>NOTES</H2><PRE>
       The header file <STRONG>&lt;form.h&gt;</STRONG> automatically includes the header
       file <STRONG>&lt;curses.h&gt;</STRONG>.


</PRE>
<H2>PORTABILITY</H2><PRE>
       These  routines  emulate the System V forms library.  They
       were not supported on Version 7 or BSD versions.

       It may be unwise to count on the set of attributes  copied
       by  <STRONG>dup_field</STRONG>  being  portable; the System V forms library
       documents are not very explicit about what gets copied and
       what does not.


</PRE>
<H2>AUTHORS</H2><PRE>
       Juergen  Pfeifer.   Manual  pages  and  adaptation for new
       curses by Eric S. Raymond.


                                                     <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>
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