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