Run MFC exe from Command Line

This is a discussion on Run MFC exe from Command Line within the Windows Programming forums, part of the Platform Specific Boards category; Hi, I would like to create an MFC program using the wizard (MS VC++), but I would also like the ...

  1. #1
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    Run MFC exe from Command Line

    Hi,

    I would like to create an MFC program using the wizard (MS VC++), but I would also like the facility to run the program from the command line using various switches and parameters.

    When I run from command line, I dont want the window to be display, just for it to do its business and return info back to command line.

    Does this sound fesible and easy to do?

    Regards

    Mike

  2. #2
    and the hat of wrongness Salem's Avatar
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    Seems reasonable to me - when you detect a command line, you skip all the window generation and message loop business, and just do what the command line tells you.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  3. #3
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    Any clues how I would detect a command line?

  4. #4
    &TH of undefined behavior Fordy's Avatar
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    Quote Originally Posted by magic.mike
    Any clues how I would detect a command line?
    CWinApp has a datamember (m_lpCmdLine) that contains the command line

  5. #5
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    Many Thanks - I can trap the command line and not show the dialog box using follwoing code,

    Code:
    	CString cmdLine = this->m_lpCmdLine;
    if (cmdLine.Compare("-t") == -1)
    {
    
    	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
    	}
    }
    else
    {
    	dlg.commandLineSwitch(cmdLine);
    }
    If from command line, I call the commandLineSwitch function.

    I want to be able to send output to the console, but when using cout, nothing is displayed.

    Do I hae to change the output stream, and if so how do I do it?

    Many Thanks

    Magic

  6. #6
    &TH of undefined behavior Fordy's Avatar
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    There's a switch in the PE file format (Which most exe files use) to decide whether the program will have a console or not. MFC apps are commonly created without consoles. Although I havent tried, I'm sure you could attach a console to your app using the AllocConsole API. This should also setup the std input and output handles allowing cout etc to work. If it doesnt, come back and we'll have another look

  7. #7
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    Just pass /subsystem:console to the linker in order to get a console window.

    Code:
    #pragma comment(linker, "/subsystem:console")

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