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form_field_userptr(3X)
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        form_field_userptr - associate application data with a form field
        #include <form.h>
       int set_field_userptr(FIELD *field, void*userptr);
       void *field_userptr(const FIELD *field);
       Every  form field has a field that can be used to hold application-specific
 data (that is, the form-driver  code  leaves  it  alone).	 These
       functions get and set that field.
       The   function  field_userptr  returns  NULL  on  error.  The  function
       set_field_userptr returns one of the following:
       E_OK The routine succeeded.
       E_SYSTEM_ERROR    [Toc]    [Back]
	    System error occurred (see errno).
       curses(3X), form(3X).
       The  header  file  <form.h>  automatically  includes  the  header  file
       <curses.h>.
       These  routines emulate the System V forms library.  They were not supported
 on Version 7 or BSD versions.
       The user pointer should be a void pointer.   We	leave  it  as  a  char
       pointer for SVr4 compatibility.
       Juergen Pfeifer.  Manual pages and adaptation for new curses by Eric S.
       Raymond.
							form_field_userptr(3X)
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