MFC程序带参数运行实例

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koma0769 2021-08-02 14:35:32 ©著作权

文章标签 mfc initialization constructor system features 文章分类 C/C++ 后端开发

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鱼老大需要让两子程序带参数运行，于是仔细找找了，原来MFC中自带有一个成员变量m_lpCmdLine保存有参数。以下是自己学习的心得，其中包含MFC源码介绍及DEMO：

1、该参数在MFC源码中的位置如下，打开AFXWIN.H，可以找到：

class CWinApp : public CWinThread
{
	DECLARE_DYNAMIC(CWinApp)
public:

// Constructor
	CWinApp(LPCTSTR lpszAppName = NULL);     // app name defaults to EXE name

// Attributes
	// Startup args (do not change)
	HINSTANCE m_hInstance;
	HINSTANCE m_hPrevInstance;
	LPTSTR m_lpCmdLine;
	int m_nCmdShow;

	// Running args (can be changed in InitInstance)
	LPCTSTR m_pszAppName;  // human readable name
								//  (from constructor or AFX_IDS_APP_TITLE)
	LPCTSTR m_pszRegistryKey;   // used for registry entries
	CDocManager* m_pDocManager;

	// Support for Shift+F1 help mode.
	BOOL m_bHelpMode;           // are we in Shift+F1 mode?

	......
}

2、新建一个MFC对话框程序，其中下面两个函数中添加的源代码如下：

BOOL CB1App::InitInstance()
{
	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

	if((m_lpCmdLine[0] == _T('/0')) || (lstrcmp(m_lpCmdLine, _T("b1")) != 0))   
	{   
		m_bCmdRet=TRUE;
	} 
	else
		m_bCmdRet=FALSE;

	......
}

/
// CB1Dlg message handlers
BOOL CB1Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// 判断参数是否正确，否则退出
	// 参数在App类初始函数中
	if(m_bCmdRet)
	{
		//MessageBox("参数错误！");
		EndDialog(0);
	}
	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	......
}

3、程序运行截图：

MFC程序带参数运行实例_features