How can I stop my MFC application from calling OnFileNew() when it starts?

Question

I used Visual Studio's Application Wizard to create a skeleton MFC program with a multi-document interface. When I start this program, it automatically creates a child frame, which I don't want it to do - I need the main frame's client area to be empty until the user chooses to open a file.

The debugger tells me that a CChildFrame object is created when the application class's InitInstance() function calls ProcessShellCommand(), but what is a good entry point for me to override this behaviour?

Answer 1

This worked for me -- change

if (!ProcessShellCommand(cmdInfo))

to

if (cmdInfo.m_nShellCommand != CCommandLineInfo::FileNew && !ProcessShellCommand(cmdInfo))

in your app's InitInstance() function.

Answer 2

Skipping the ProcessShellCommand() call (in case of FileNew) in InitInstance() is indeed the way to go.

Answer 3

This works, it maintains printing/opening from the shell etc.

// Parse command line for standard shell commands, DDE, file open
CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo);

if ( cmdInfo.m_nShellCommand == CCommandLineInfo::FileNew )
{
 cmdInfo.m_nShellCommand = CCommandLineInfo::FileNothing ;
}

// Dispatch commands specified on the command line
if (!ProcessShellCommand(cmdInfo))
 return FALSE;

Answer 4

Do one thing..

in your XXXApp.cpp file

in this Method:-

comment the following line.. /*

    CCommandLineInfo cmdInfo;
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; 

*/

like this....