Arguments to WinMain

[gunnar66]

Hi There!. I am a newcommer in MFC programming. How does one parse parameters passed as command line arguments in the Win32 environment? I know i can use lpCmdLine, but how do i do that? Can someone show me an example. By the way I am useing Embedded Visual c++

[Mike Dimmick]

The lpCmdLine parameter is an exact copy of the command line passed to your program, including all spaces, quote marks, etc. If you want to treat this as separate arguments, you must split it. MFC supplies its own WinMain by default; however, you can override this if you wish. If you do so, call AfxWinInit to initialize MFC, and AfxWinTerm before returning. The MFC WinMain is implemented in winmain.cpp. It's rare to do this. Typically, you instead override InitInstance in your class derived from CWinApp. You can then access the command line from CWinApp's m_lpCmdLine parameter. MFC offers the CCommandLineInfo class and the ParseCommandLine function for helping with command lines. To add support for your own options, create a new class which inherits CCommandLineInfo. Then override ParseParam. Stability. What an interesting concept. -- Chris Maunder

[gunnar66]

Thanks. lpCmdLine is a unsigned short *. The value i passed in the command line is just a BYTE (0-15). How can i convert lpCmdLine to a BYTE? Gunnar

[David Crow]

Whether the command line contained one byte or several dozen, lpCmdLine is accessed in the same manner for each. It's simply a pointer to the command-line arguments.

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"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)