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MicroStation Wiki Using the VBA object PropertyHandler to change the Element Information
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    Using the VBA object PropertyHandler to change the Element Information

       
      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
       

    A popular tool for querying and modifying element information cal also be controller via VBA:

    All data fields that can also be manually changed by the user in this dialog box can also be controlled via VBA with demObjectType PropertyHander. Access to the fields is by the name of the field. In the VBA Help, there are also examples of how to use the Property Brokers. In addition, here is a small example to help the reading out of names of the fields so that you know how to access the fields.

    Sub prophandLine()
    Dim ee As ElementEnumerator
    Dim oProp As PropertyHandler
    Dim found As Boolean
    Dim l() As String
    Dim val As String
    Dim point As Point3d
    Set ee = ActiveModelReference.GraphicalElementCache.Scan
    Do While ee.MoveNext
     
        If ee.Current.Type = msdElementTypeLine Then
             
            Set oProp = CreatePropertyHandler(ee.Current)
             
            ' All out by name:
            l = oProp.GetAccessStrings
             
            found = False
            For i = LBound(l) To UBound(l)
                Debug.Print l(i)   ' Lists all names in the VBA EDitor
                If l(i) = "Segments[0].Start" Then found = True
            Next
             
            ' Value read amd changed if present:
            If found Then
                oProp.SelectByAccessString ("Segments[0].Start")
                point = oProp.GetValueAsPoint3d
                point.x = point.x + 1
                point.y = point.y - 1
                oProp.SetValueAsPoint3d point
            End If
        End If
    Loop
    End Sub

    In the example, all the graphic elements of the active model are first of all read and checked individually. Only lines are to be further investigated. For each line, a PropertyHandler is created with the information of this line.

    About the statement:

    l = oProp.GetAccessStrings

    It then reads all access names and then checked to see whether a field of "segment [0] .Start" is.

    If so, we have then found the origin of the line. This is written for test purposes and is slightly changed (x + 1, y - 1) and back again so that all the starting points of all lines were changed by the end.

    See Also

    Placing annotation cells with VBA

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