LogiView

Command 'field_get_buf'

     

Use this command to read a value from the corresponding field for the specified key. If no value is found no value is returned.

 

Syntax:

  field_get_buf ({WDG_ID}, {FLD}, {STR_EXPR}, {VAR})
 

I/O parameters:

{WDG_ID} Widget ID
{FLD} Name of field
{STR_EXPR} Key of field buffer entry
{VAR} Variable to be initialized with the field buffer value
 

Return value:

 
-  
 

Example:

  Declaration of Variables
 
10 field_get_buf (widget_id(), "T_MASTER_DAT.PART_ID", 
   "OLD_VALUE", CONTENTS)
20 if (CONTENTS != "")
30   put (strprint("Old field contents is "\%s\"", CONTENTS))
40 endif

Functions and commands: Modification of Fields