Open an MFC dialog based application using the Windows context menu Send To command

You're abolutley right about 'InitInstance()' (https://msdn.microsoft.com/en-us/library/ae6yx0z0.aspx), the MSDN docs even have sample code how this works using 'CCommandLineInfo'. You're also right about 'GetCommandLine()' (https://msdn.microsoft.com/en-us/library/windows/desktop/ms683156(v=vs.85).aspx), which is a Windows API that returns the command line 'as is', i.e. you would have to parse it yourself, or use a utility class that does this for you like http://www.codeproject.com/Articles/1406/A-Command-Line-Class - which in your case can indeed be as simple as the sample snippet from that article:

BOOL CTestApp::InitInstance()
{
	CCommandLine pCmd;
	CString strFlag = _T("");
	CString strParam = _T("");

	BOOL bRet = pCmd.GetFirstParameter(strFlag, strParam);
	while(bRet)
	{
		DoSomethingWithTheParameter(strFlag, strParam);
		bRet = pCmd.GetNextParameter(strFlag, strParam);
	}
	.....
	.....
}

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