CWinAPP::ParseCommandLine() and CCommandLineInfo

[John E]

Does anyone know if the above can be used to extract flags from a list of command line arguments? For example, if someone started my app using this command line:-

MyApp -L -D hello goodbye

I could extract the parameters hello and goodbye - but how can I discover that 2 flags preceded them?

[hoxsiew]

You can override the CCommandLineInfo class and assign it to your CWinApp, then deal with it in the override.

void CMyCommandLineInfo::ParseParam(const TCHAR* pszParam,BOOL bFlag,BOOL bLast)
{
  if((_wcsicmp(pszParam,L"l")==0)&&(bFlag==1)){
    m_bMyLFlag=1;
  }
  if((_wcsicmp(pszParam,L"d")==0)&&(bFlag==1)){
    m_bMyDFlag=1;
  }
  CCommandLineInfo::ParseParam(pszParam,bFlag,bLast);
}

Then in your App InitInstance():

  CMyCommandLineInfo cmdInfo;


  ParseCommandLine(cmdInfo);
  if(!ProcessShellCommand(cmdInfo)){
		return FALSE;
  }

  //check for command line switches
  if(cmdInfo.m_bMyLFlag){
    //do something
  }

[John E]

Thanks, I'll experiment with that tomorrow. I wonder why CWinApp::ParseCommandLine() isn't virtual? That would have made life a lot easier.

[kirants]

MFC General: How to process command line arguments in a MFC application?

[John E]

Thanks Kirants. That's pretty much the same as Hoxsiew's suggestion so I'll try it out today.

[John E]

Kirants, your code works except for the 'flag' comparisons (/o, /e and /whatever). If the parameter was a flag, Windows strips off the leading '-' or '/'

So, for example, instead of :-

if (0 == strcmp(pszParam, "/o"))

hozsiew's suggestion would be better :-

if ((0 == strcmp(pszParam, "o")) && (bFlag))

[kirants]

Thanks for the headsup, John E. I need to update the FAQ