How to stop initial new document at startup in MFC doc/view app

Question

My MFC skill are rusty these days, so I'm hoping this is a simple question for someone out there.

I just created a MFC doc/view Ribbon app using the VS 2010 wizzard. When I launch my app, it always gets a call to create a new document. I traced it back to ParseCommandLine(cmdInfo); in the app InitInstance method. The m_nShellCommand in the cmdInfo object has a value of FileNew. I'm assuming this is causing the initial new document on app launch.

So how did this command get there in the first place and how do I turn it off? I need my app to start with no documents.

Answer 1

	CCommandLineInfo cmdInfo;
/* REMOVE THIS PART
	ParseCommandLine(cmdInfo);

	// Dispatch commands specified on the command line.  Will return FALSE if
	// app was launched with /RegServer, /Register, /Unregserver or /Unregister.
	if (!ProcessShellCommand(cmdInfo))
		return FALSE;
*/
/* ADD THIS PART
*/
	cmdInfo.m_nShellCommand = CCommandLineInfo::FileNothing;
	if (!ProcessShellCommand(cmdInfo))
		return FALSE;

	// create main frame window
	CMainFrame* pMainFrame = new CMainFrame;
	if (!pMainFrame || !pMainFrame->LoadFrame(IDR_MAINFRAME))
	{
		delete pMainFrame;
		return FALSE;
	}
	m_pMainWnd = pMainFrame;

For this to work you will have to make the CMainFrame constructor public.

Answer 2

Alternatively, you can replace:

		if (!ProcessShellCommand(cmdInfo))
			return FALSE;

by

	// Dispatch commands specified on the command line.  Will return FALSE if
	// app was launched with /RegServer, /Register, /Unregserver or /Unregister.
	if (cmdInfo.m_nShellCommand == CCommandLineInfo::FileNew)
	{
		// do nothing
	}
	else
	{
		if (!ProcessShellCommand(cmdInfo))
			return FALSE;
	}

 

Answer 3

Thanks guys!

Answer 4

Hello !!

If you read the documentation and code :

The CCommandLineInfo cmdInfo is created by its default constructor; which sets its properties  (m_bShowSplash=TRUE) and (more important):(m_nShellCommand=NewFile). Then, it is used through CWinApp::ParseCommandLine and ProcessShellCommand.

You could simply add the line, just after cmdInfo is built :

cmdInfo.m_nShellCommand = cmdInfo.FileNothing;

best regards,

Arnaud.