Visual C++ and MFC Programming 2nd Edition

Visual C++ and MFC Fundamentals Chapter 7: GDI Accessories and Tools

A square is a rectangle whose sides are all equal. Therefore, to draw a square, when

specifying the arguments of the Rectangle() method, make sure that |x1 - x2| = |y1 - y2|.

Practical Learning: Drawing Rectangles

6.3.7 A Rectangle With Edges.....................................................................

The CDC class provides another function member you can use to draw a rectangle. This

time you can control how the edges of the rectangle would be drawn. The method used is

called DrawEdge and its syntax is:

BOOL DrawEdge(LPRECT lpRect, UINT nEdge, UINT nFlags);

The lpRect argument is passed as a pointer to a RECT or CRect, which is the rectangle

that would be drawn.

The nEdge value specifies how the interior and the exterior of the edges of the rectangle

would be drawn. It can be a combination of the following constants:

Value Description

BDR_RAISEDINNER The interior edge will be raised

BDR_SUNKENINNER The interior edge will be sunken

BDR_RAISEDOUTER The exterior edge will be raised

BDR_SUNKENOUTER The exterior edge will be sunken

These values can be combined using the bitwise OR operator. On the other hand, you can

use the following constants instead:

Value Used For

EDGE_DUMP BDR_RAISEDOUTER | BDR_SUNKENINNER

EDGE_ETCHED BDR_SUNKENOUTER | BDR_RAISEDINNER

EDGE_RAISED BDR_RAISEDOUTER | BDR_RAISEDINNER

EDGE_SUNKEN BDR_SUNKENOUTER | BDR_SUNKENINNER