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# LogiView

## Command 'field_set_buf'

| Use this command to initialize the buffer of a specified field with a transferred value using a specified key.
| ### Syntax:
| field_set_buf ({WDG_ID}, {FLD}, {STR_EXPR}, {EXPR})
| ### I/O parameters:
| {WDG_ID} | Widget ID
| {FLD} | Name of field
| {STR_EXPR} | Key of field buffer entry
| {EXPR} | Value to be written to the field buffer
| - |
| ### Return value:
| - |
| ### Example:
| Declaration of Variables
    10 field_set_buf (widget_id(), "T_MASTER_DAT.PART_ID", "OLD_VALUE"
    , CONTENTS)
| Functions and commands: Modification of Fields