Are there any caveats to how I can use the RunSimulation, PauseSim, and ResumeSimulation functions?
These functions are not recommended for use via OLE automation or DDE Execute messages at all. These functions were developed before the External Scripting functionality was fully developed, and they do not work as well in this context as the ExecuteMenuCommand function. This function acts exactly as if you have selected the specified command from the menu bar and will perform better with the external control methods. The ExecuteMenuCommand function takes one argument, the command number. These numbers are defined in the Programmer Reference.