InflateRect

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procedure InflateRect(var R: TRect; Dx, Dy: Integer); overload;

procedure InflateRect(var FR: TFloatRect; Dx, Dy: Single); overload;

Description

Increases (or decreases if Dx, Dy negative) the width and height of the specified rectangle:

R.Left := R.Left - Dx;

R.Right := R.Right + Dx;

R.Top := R.Top - Dy;

R.Bottom := R.Bottom + Dy;