A COMMON statement or a DECLARE statement occurs after an
executable statement. COMMON and DECLARE statements must
appear before any executable statements. All Basic
statements are executable except the following:
 
    COMMON                     OPTION BASE
    CONST                      REM
    DATA                       SHARED
    DECLARE                    STATIC
    DEFtype                    TYPE
    DIM (for static arrays)    $STATIC and $DYNAMIC