Visual C++ and MFC Programming 2nd Edition

Index Visual C++ and MFC Fundamentals

12. Click Open


13. Delete the TODO line on the dialog box. Add a new Button. Change its Caption to
    MOI Test


14. Double-click the new button to initiate its BN_CLICKED message


15. Implement it as follows:

// MOITestDlg.cpp : implementation file

//

#include "stdafx.h"

#include "MOITest.h"

#include "MOITestDlg.h"

#include ".\moitestdlg.h"

#ifdef _DEBUG

#define new DEBUG_NEW

#endif

// Calculation of the moment of inertia

// Rectangle

extern "C" _declspec(dllimport)double MOIRectangle(double b, double h);

// Semi-Circle

extern "C" _declspec(dllimport)double MOISemiCircle(double r);

// Triangle

extern "C" _declspec(dllimport)double MOITriangle(double b, double h, int);

// CMOITestDlg dialog

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

: CDialog(CMOITestDlg::IDD, pParent)

{

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

}

...

void CMOITestDlg::OnBnClickedButton1()

{

// TODO: Add your control notification handler code here

double MOI = MOIRectangle(3.25, 2.65);

char Sentence[40];