bool CreatePointBoundaryCondition(Autodesk.Revit.DB.Document document, AnalyticalMember column)
{
   // Get the start point reference of the column
   Reference startReference = null;
   if (null != column)
   {
      AnalyticalModelSelector selector = new AnalyticalModelSelector(column.GetCurve(), AnalyticalCurveSelector.StartPoint);
      startReference = column.GetReference(selector);
   }
   else
   {
      throw new Exception("Cannot get end point for selected column");
   }

   // Get the Revit creation document
   Autodesk.Revit.Creation.Document docCreation = document.Create;

   // Create the Point Boundary Conditions for the start point
   BoundaryConditions condition = docCreation.NewPointBoundaryConditions(startReference,
                                                                         TranslationRotationValue.Fixed, 0,
                                                                         TranslationRotationValue.Fixed, 0,
                                                                         TranslationRotationValue.Fixed, 0,
                                                                         TranslationRotationValue.Fixed, 0,
                                                                         TranslationRotationValue.Fixed, 0,
                                                                         TranslationRotationValue.Fixed, 0);
   if (null == condition)
   {
      throw new Exception("Can't create the point boundary condition for selected column start point.");
   }

   // Give the user some information
   TaskDialog.Show("Revit", "Point boundary condition created successfully.");

   return (null != condition);
}

Private Function CreatePointBoundaryCondition(document As Autodesk.Revit.DB.Document, column As FamilyInstance) As Boolean
    ' Get the start point reference of the column
    Dim startReference As Reference = Nothing
 Dim analyticalModel As Autodesk.Revit.DB.Structure.AnalyticalElement = Nothing
 Dim relManager As Autodesk.Revit.DB.Structure.AnalyticalToPhysicalAssociationManager = Autodesk.Revit.DB.Structure.AnalyticalToPhysicalAssociationManager.GetAnalyticalToPhysicalAssociationManager(document)

 If (relManager Is Nothing) Then
    Return False
 End If

 Dim counterpartId As ElementId = relManager.GetAssociatedElementId(column.Id)
 If (counterpartId Is Nothing) Then
    Return False
 End If

 analyticalModel = document.GetElement(counterpartId)

 If analyticalModel IsNot Nothing Then
    Dim selector As AnalyticalModelSelector = New AnalyticalModelSelector(analyticalModel.GetCurve(), AnalyticalCurveSelector.StartPoint)
    startReference = analyticalModel.GetReference(selector)
 Else
    Throw New Exception("Cannot get end point for selected column")
    End If

    ' Get the Revit creation document
    Dim docCreation As Autodesk.Revit.Creation.Document = document.Create

    ' Create the Point Boundary Conditions for the start point
    Dim condition As BoundaryConditions = docCreation.NewPointBoundaryConditions(startReference, TranslationRotationValue.Fixed, 0, TranslationRotationValue.Fixed, 0, TranslationRotationValue.Fixed, _
        0, TranslationRotationValue.Fixed, 0, TranslationRotationValue.Fixed, 0, TranslationRotationValue.Fixed, _
        0)
    If condition Is Nothing Then
        Throw New Exception("Can't create the point boundary condition for selected column start point.")
    End If

    ' Give the user some information
    TaskDialog.Show("Revit", "Point boundary condition created successfully.")

    Return (condition IsNot Nothing)
End Function