protected override void SetShapeText(string text)
{
VisioShape.get_Cells("LockTextEdit").ResultIU = 0;
VisioShape.Text = text;
VisioShape.get_Cells("LockTextEdit").ResultIU = 1;
}
/// <summary>
/// Changes shape-specific properties
/// </summary>
public virtual void ChangeShapeProperties(string prop, string value)
{
VisioShape.get_Cells(prop).Formula = value;
}