property Record.FieldWidth as Long
Retrieves or sets a value that indicates the width of the field.

TypeDescription
Long A long expression that specifies the width of the fields. 
The FieldWidth property specifies the width of the fields, in pixels. By default, the FieldWidth property is -1. If the FieldWidth property is negative, the field's width is the width of the control's client area. The control's client area excludes the control's border. Use the Font property to specify the control's font. Use the FieldHeight property to specify the height of the fields. Use the HBorderField property to specify the distance between two fields on the horizontal axis. Use the BorderWidth property to specify the control's border. Use the HFieldCount property to specify the number of fields on the horizontal axis. Use the LabelSize property to specify the width of the label.