GPIO驱动程序

// GPIOBeep.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "GPIOBeep.h"
#include "GPIOBeepDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CGPIOBeepApp

BEGIN_MESSAGE_MAP(CGPIOBeepApp, CWinApp)
        //{{AFX_MSG_MAP(CGPIOBeepApp)
                // NOTE - the ClassWizard will add and remove mapping macros here.
                //    DO NOT EDIT what you see in these blocks of generated code!
        //}}AFX_MSG
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGPIOBeepApp construction

CGPIOBeepApp::CGPIOBeepApp()
        : CWinApp()
{
        // TODO: add construction code here,
        // Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CGPIOBeepApp object

CGPIOBeepApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CGPIOBeepApp initialization

BOOL CGPIOBeepApp::InitInstance()
{
        // Standard initialization
        // If you are not using these features and wish to reduce the size
        //  of your final executable, you should remove from the following
        //  the specific initialization routines you do not need.

        CGPIOBeepDlg dlg;
        m_pMainWnd = &dlg;
        int nResponse = dlg.DoModal();
        if (nResponse == IDOK)
        {
                // TODO: Place code here to handle when the dialog is
                //  dismissed with OK
        }
        else if (nResponse == IDCANCEL)
        {
                // TODO: Place code here to handle when the dialog is
                //  dismissed with Cancel
        }

        // Since the dialog has been closed, return FALSE so that we exit the
        //  application, rather than start the application's message pump.
        return FALSE;
}

这是周立功的GPIO的输出控制实验
BOOL CGPIOBeepApp::InitInstance()类似这种语句看不懂
各位大侠有没有哪里有注解
可以看的懂些

BOOL ::InitInstance()
类里面的函数定义，查查CGPIOBeepApp这个类，C++的东西