The frame currently open in Multiframe can be analysed using the Analysis object.  This object manages the setting for each of the different analyses, records which analyses are to be performed, and executes the analysis.  The following code fragment is used to perform a linear analysis of the portal frame.

'Perform linear analysis
With mfApp.Frame.Analysis
  .Linear = True
  .Nonlinear = False
  .Analyse
End With

This code accesses the Linear and Nonlinear properties of the Analysis object to set which analyses are to be performed.  The analysis is then executed within Multiframe by calling the Analyse method.