MFC中获取命令行参数

 以对话框程序a为例：

1、重载CAApp::InitInstance 代码如下：

BOOL CAApp::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
 /*
 __argc 表示个数
 __argv 表示参数
 __argv[0] 就是你启动应用程序的完整路径
 __argv[1] 传入的一个参数
 __argv[n] 传入的第n-1个参数
 */
 for(int i=0; i<__argc; i++)
 {
  TRACE(_T("arg%d = %s\\n"), i, __argv[i]);
 }

 CADlg 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;
}

2、按下“ALT+F7”打开“Projet Settings” 切换到Debug选项卡，在Program arguments下的文本框中输入"a b c"，点击“OK” 退出。

3、按下"F5"运行程序，可以看到Debug窗口输出：

Loaded 'C:\\Windows\\System32\\msctf.dll', no matching symbolic information found.
Loaded 'C:\\Windows\\System32\\MFC42LOC.DLL', no matching symbolic information found.
arg0 = D:\\Documents\\Microsoft Visual Studio\\MyProjects\\a\\Debug\\a.exe
arg1 = a
arg2 = b
arg3 = c
Loaded 'C:\\Windows\\winsxs\\x86_microsoft.windows.common-controls_6595b64144ccf1df_5.82.7601.17514_none_ec83dffa859149af\\comctl32.dll', no matching symbolic information found.
Loaded 'C:\\Windows\\System32\\advapi32.dll', no matching symbolic information found.