Visual C++ and MFC Programming 2nd Edition

Chapter 15: Fundamental Controls Visual C++ and MFC Fundamentals

CRect Recto;

m_Panel.GetWindowRect(&Recto);

CClientDC dc(this);

CBrush BlueBrush(RGB(0, 128, 192));

CBrush *pOldBrush = dc.SelectObject(&BlueBrush);

ScreenToClient(Recto);

dc.Rectangle(Recto);

dc.SelectObject(pOldBrush);

}

This time, even if the dialog box moves, the GetWindowRect() method returns the same

rectangle.

If the location and/or dimension are given in client coordinates, to convert them to screen

coordinates, call the ScreenToClient() method. It is overloaded as follows:

void ScreenToClient(LPPOINT lpPoint) const;

void ScreenToClient(LPRECT lpRect) const;

This method follows the opposite logic of the ClientToScreen() method.

Practical Learning: Using Client and Screen Coordinates

1. The Geometry application should still be opened.
   From the Resource View tab open the IDD_CIRCULAR dialog box


2. On the Controls toolbox, click the Picture control and draw a rectangular shape
   on the left side of the dialog box