The LINES and SIZE values describe the size of the check box's title area. The LINES value specifies the number of lines tall the title area will be. The SIZE value specifies the width of the title area, using the width of the "0" (zero) character as the base unit. Added to the title area is overhead needed for the actual check box. This usually adds several character positions to the width, and may affect the height if the check box is taller than the title's font.
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.
LINES has a default value of "1". The default value of SIZE is computed by measuring the length of the title using the check box's font and dividing by the width of the "0" (zero) character. Thus, the default width of a check box exactly occupies the space its text takes up on the screen.
When the BITMAP style is used, the LINES and SIZE values have a different meaning. The values are the number of pixels in the height and width of the bitmap image (see Chapter 3, section 3.8, for details). If omitted, the default values depend on the host system. Under Microsoft Windows, the default LINES value is "15" and the default SIZE value is "16". These correspond to the size of buttons typically found on a toolbar.