@X                    // returns the address of X
P^                    // dereference P, returns the value located at address P

Addr(X)               // Addr is equivalent to the @ operator

Ptr(Address: Integer) // Ptr converts an integer to a pointer


var
 X, Y: Integer;   // X and Y are Integer variables
 P: ^Integer;     // P points to an Integer
begin
 X := 17;         // assign a value to X
 P := @X;         // assign the address of X to P
 Y := P^;         // dereference P; assign the result to Y
end;

URL: http:// cpcug.org / user / clemenzi / technical / Languages / Pointers.html