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MicroStation Wiki Automatic Subroutine Loading
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    Automatic Subroutine Loading

       
      Applies To 
       
      Product(s): MicroStation
      Version(s): 08.11.09.578
      Environment:  Windows 7 32 bit,Windows 7 64 bit
      Area:  Programming
      Subarea:  VBA
      Original Author: Tristan Anderson, Bentley Technical Support Group
       

     

    The naming of a subroutine generally does not matter. One exception, however, is the name OnProjectLoad. If a subroutine gets this name, it is automatically started as soon as it is loaded.

    This makes it much easier to use when you start MicroStation to load a VBA project because not only does it load, it runs.

    Here this is a small example:

    Sub  OnProjectLoad ()
        MsgBox "Hello, I was just loaded"
        ActiveWorkspace.AddConfigurationVariable "neue_variable", "testwert", True
    End Sub

    If a dialog box is opened, it means that the subroutine has executed. A configuration variable is then set and written in the UCF file. For this subroutine is executed automatically at startup, this project needs to be loaded automatically. It must be listed in the variables MS_VBAAUTOLOADPROJECTS.

    You can also edit the variable or simply make a hook in the project editor as shown circled here:

    7777777777777

    When you restart Microstation, the OnProjectLoad routine is automaticall loaded and executed, as can be seen below:

    8888888888888

    Not only does this screenshot show that the routine was executed, but that the subroutine is already running during the startup of Microstation.

    Behind the message box is still the splashscreen of Microstation, so the subroutine has already been carried out before the Microstation Manager to select a drawing appears.

    It is important at this point to note that although commands can be executed, commands relating to the contents of a drawing leads to errors. It is still possible, however, but the installation of an event handler that catches the opening of a drawing is required. More information about this can be found in the following article.

     

     

     

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