C++MFC implement a parameter launch test

[emerson]

Ask as simple a way as possible to carry out the verification that the annex is launched with a parameter. I mean, if there's no parameter to make a mistake, if it matches to start.

C++MFC

Any examples?

[gionna]

Use it. ParseCommandLine

Example:

NewComandLineInfo.h
class CNewCommandLineInfo : public CCommandLineInfo

{

public:

CString m_sHostAddr;

UINT    m_nPort;
void ParseParam(LPCTSTR lpszParam, BOOL bFlag, BOOL bLast);

};

NewComandLineInfo.cpp
#include "stdafx.h"

#include "CommandLineInfoEx.h"
void CNewCommandLineInfo::ParseParam(LPCTSTR lpszParam, BOOL bFlag, BOOL bLast)

{

if(bFlag) {

CString sParam(lpszParam);

if (sParam.Left(2) == "h:") {

m_sHostAddr = sParam.Right(sParam.GetLength() - 2);

return;

}
    if (sParam.Left(2) == "p:") {
        CString sTemp;

        sTemp = sParam.Right(sParam.GetLength() - 2);
        m_nPort = atoi(sTemp);
        return;
    }
}

// Call the base class to ensure proper command line processing
CCommandLineInfo::ParseParam(lpszParam, bFlag, bLast);

}

We also need to modify the CWinApp derived class to include our special command line processing:
// Example.cpp : Defines the class behaviors for the application.

//
#include "NewCommandLineInfo.h"
...
BOOL CExampleApp::InitInstance()

{

...

// Parse command line for standard shell commands, DDE, file open

// and user-defined flags. The CCommandLine class has been replaced

CNewCommandLineInfo cmdInfo;

ParseCommandLine(cmdInfo);
// Access the variables if needed
CString sHostAddr = cmdInfo.m_sHostAddr;
UINT nPort = cmdInfo.m_nPort;
...

}