Mid$(
    ------------------
    Basic keyword
     
     
    Mid$(string,position)
    Gives all of string starting from position.
     
    Mid$(string,position,count)
    Gives some of string from position.
     
    Mid$(string variable,position[,count]) = string2
    Overwrite all [or count] characters in string variable,
    with characters from string2.
     
    Examples:
    a$=Mid$("ABCDEFGH",3)
    Rem gives a$="DEFGH"
     
    a$=Mid$("ABCDEFG",3,2)
    Rem gives a$="CD"
     
    a$="ABCDEFG"
    Mid$(a$,3,2)="XY"
    Rem gives a$="ABXYEFG"