The SIZE value describes the width of the entry field portion of the combo box. It is interpreted in the same fashion as for an ENTRY FIELD control. The LINES value describes the number of lines shown in the combo box. The entry field portion of the box counts as one of the lines. The remaining lines are part of the list box. Any overhead needed for boxes and other sub-controls (such as scroll bars) is added to these values. Note that a vertical scroll bar is automatically added when the number of items in the list exceeds the value of LINES.
When the program executes on a non-graphical system, the values specified in the CLINES and CSIZE phrases, if present, replace the values specified by the LINES and SIZE phrases.
The default LINES value is "5". The default SIZE value depends on whether or not a VALUE is specified when the combo box is created. If a VALUE is specified, the default SIZE value equals the size of the VALUE literal or data item. Otherwise, the default SIZE is "12".