First of all type casting does not CHANGE values!!!!

Type casting changes TYPEs only

I.E. byte to char

var
   c:Char; b:byte;

B
 c:=char(b);
E

Pointer to Longint to array
type
    arr=array[0..3] of byte;
var
   p:pointer; l:longint; a:Arr;

B
 p:=nil;
 l:=Longint(p); { l=0 }
 A:=Arr(p);
E

Type casting tells the compiler to interpet the structure as a different
structure.  It is not a conversiton.  If you look up sizeof() you will see
more on structure sizes and formations.  If you have any more questions
about type castings - write.
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