Performing Complex Actions Using Methods
Go Up to Automation Objects Programmer's Guide
Methods perform actions more complex than the simple setting or reading of a property. For example, OpenFile() is a DiagramManager method that in turn invokes a number of other operations: it must navigate the directory/file system, allocate resources for file handling, keep track of the file handle and attributes and so on.
Dim MyDiagram As Diagram
Dim strFile As String
strFile = "C:\Users\<user>\AppData\Roaming\IDERA\ERStudio\Model\MyModel.dm1 "
Set MyDiagram = DiagramManager.OpenFile(strFile)