# RectGrow

void RectGrow (Rect *rect, int dx, int dy);

## Purpose

Modifies the values in a Rect structure so that the rectangle it defines grows or shrinks around its current center point.

## Parameters

Input
Name | Type | Description
dx | integer | Amount to grow the rectangle horizontally. Use a negative value to shrink the rectangle horizontally.
dy | integer | Amount to grow the rectangle vertically. Use a negative value to shrink the rectangle vertically.
Output
Name | Type | Description
rect | Rect | On input, the size and location of a rectangle. On output, a rectangle of a different size but the same center point.

## Return Value

None.