Rounds a Real-type value to an Integer-type value.
function Round(X: Real): Longint;
Windows, Real, Protected
X is a real-type expression. Round returns a Longint value that is the
value of X rounded to the nearest whole number. If X is exactly halfway
between two whole numbers, the result is the number with the greatest
absolute magnitude. A run-time error occurs if the rounded value of X is
not within the Longint range.