Extract the attached archive, and open Create Data Type Using TestStand API.seq.
Run the sequence using Execute » Run Mainsequence.
When prompted, select the TargetSequenceFile.seq.
After the execution completes, open TargetSequenceFile.seq in the sequence editor. Press Ctrl + T to open the types pane. Observe that a new type is present under Custom Data Types in the sequence file.
select the TargetSequenceFile.seq tab. Observe that an instance of the type is generated in the MainSequence local variables.