I am developing a computer simulation in SIMUL8 together with a userform in Excel to input configuration data and draw graphs of results. When “Finish” is clicked on the Excel Userform, VB calls the simulation, the simulation imports the configuration data and executes, and upon completion passes results data back to Excel to draw a graph. Currently the Excel spreadsheet remains displayed on screen while the simulation executes. I would like the screen display to switch to the simulation during execution so that the animation is visible, and then upon completion of the simulation switch back to the graph in the Excel spreadsheet. Is this controllable in VB?