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Disabling ShellOpen???

My MFC application accepts opening registered files by double-clicking on them. I need this behaviour, except when a flag is set (bNotAccept=TRUE). In this case no external DDE event should interfere with program execution. How can I handle this?

Tommy Hui

In your Application::InitInstance() function, there's a section of code that looks like

      // Parse command line for standard shell commands, DDE, file open
      CCommandLineInfo cmdInfo;
      ParseCommandLine(cmdInfo);

      // Dispatch commands specified on the command line
      if (!ProcessShellCommand(cmdInfo))
            return FALSE;

This is the part that parses the DDE interface. If you replace it with

      int oldShellCommand = cmdInfo.m_nShellCommand;

      if (oldShellCommand == CCommandLineInfo::FileOpen && bNotAccept)
            cmdInfo.m_nShellCommand = CCommandLineInfo::FileNothing;

      // Dispatch commands specified on the command line
      if (!ProcessShellCommand(cmdInfo))
            return FALSE;

Then that should do what you want.

winmeister

ASKER

Thui,
your code is executed only during InitIntance. I need to change the behaviour during program execution: at certain point, if the flag goes up, the program should reject all DDE processing.

Tommy Hui

You should then terminate all DDE conversations. There isn't anything in MFC that I know of that automatically responds to DDE commands for you. You need to change your existing DDE code.

winmeister

ASKER

Actually I don't know which is my "existing DDE code". I just have an EnableShellOpen() command in InitInstance, before file type registration.

ASKER CERTIFIED SOLUTION

chensu

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