Visual C++ and MFC Programming 2nd Edition

Visual C++ and MFC Fundamentals Chapter 18: Progress-Based Controls

CRect RectPreview;

// Create a brush to use

CBrush BrushColor(RGB(ColorRed, ColorGreen, ColorBlue));

// Get the location and dimensions of the picture control

m_Preview.GetWindowRect(&RectPreview);

// Select the brush

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

// Use the client coordinates

ScreenToClient(&RectPreview);

// Draw or update the background of the picture control

dc.Rectangle(&RectPreview);

// Restore the previous brush

dc.SelectObject(pOldBrush);

}

9. In the source file, initialize each member variable with 192

CPreviewerDlg::CPreviewerDlg(CWnd* pParent /*=NULL*/)

: CDialog(CPreviewerDlg::IDD, pParent)

{

m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

ColorRed = 192;

ColorGreen = 192;

ColorBlue = 192;

}

10. Save All

18.4.3..Creating a Scroll Bar Control............................................................

The scroll bars we have added to the view classes above are inherently provided by the

operating system and can sometimes transparently added to a view of an application with

little of your intervention. Alternatively, Visual C++ provides two scroll bar controls you

can add to a dialog box or a form and positioned anywhere you judge necessary.

To add a vertical scroll bar control to a dialog box or a form at design time, on the

Controls toolbox, click the Vertical Scroll Bar button and click an area on the host.

In the same way, to add a horizontal scroll bar control, on the Controls toolbox, click the

Horizontal Scroll Bar button and click the body of dialog box or that of the form.

After adding the control, it assumes a default size. You can resize it as you would do with

any other control. Here is an example: