serialcontrol.cpp

该代码是我在做课程设计时编写的一个串口调试的程序

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

#include "stdafx.h"
#include "SerialControl.h"
#include "SerialControlDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CSerialControlApp

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

/////////////////////////////////////////////////////////////////////////////
// CSerialControlApp construction

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

/////////////////////////////////////////////////////////////////////////////
// The one and only CSerialControlApp object

CSerialControlApp theApp;
//添加的标识只运行一次的属性名
CString g_szPropName = "SerialControl";
HANDLE	g_hValue = (HANDLE)1;
//添加一个枚举窗口的函数
BOOL CALLBACK EnumWndProc(HWND hwnd,LPARAM lParam)
{
	HANDLE h = GetProp(hwnd,g_szPropName);
	if( h == g_hValue)
	{
		*(HWND*)lParam = hwnd;
		return false;
	}

	return true;
}
/////////////////////////////////////////////////////////////////////////////
// CSerialControlApp initialization

BOOL CSerialControlApp::InitInstance()
{
	//查找是否有本程序的前一个实例运行
	HWND oldHWnd = NULL;
	EnumWindows(EnumWndProc,(LPARAM)&oldHWnd);	//枚举所有运行的窗口
	if(oldHWnd != NULL)
	{
		AfxMessageBox("本程序已经在运行了");
		::ShowWindow(oldHWnd,SW_SHOWNORMAL);			//激活找到的前一个程序
		::SetForegroundWindow(oldHWnd);			//把它设为前景窗口
		return false;							//退出本次运行
	}
	if (!AfxSocketInit())
	{
		AfxMessageBox(IDP_SOCKETS_INIT_FAILED);
		return FALSE;
	}

	AfxEnableControlContainer();

	// 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.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif
	CSerialControlDlg 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;
}