The LINES and SIZE values describe the size of the radio button's title area. The LINES value describes the height of the title area, in lines. 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 the overhead needed for the actual button. This usually adds several character positions to the width, and may affect the height if the button 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.
The default value of LINES is "1". The default value of SIZE is computed by measuring the length of the title using the button's font and dividing by the width of the "0" character. Thus, the default width of a radio button exactly occupies the space its text takes up on the screen.
When used with the BITMAP style, 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 values correspond to the size of buttons typically found on a toolbar.