Greetings all. We have just completed a rather large Labview Application. The program includes a substantial user interface in a tabbed style. One of the tabs has to do with Calibration of the system. Part of the Cal is for the two (2) E Series 6281 DAQS. We are using Calibration Executive to calibrate and verify the 2 cards. Cal Exec works fine (except for not being able to select a counter). Our problem is that we would like to embed the Cal Exec in the Calibration portion of our program. We could then start the Cal by pushing a button and, hopefully, stop it. That is our problem... stopping it. I wrote a VI that dynamically loads and executes the Cal Exec, but the only way to return to the main VI is to close the Cal Exec on its own screen. I know it sounds trivial, but all of our work is for Gov. Military Systems. Anyone who works in this field understand the problems with having to control multiple applications and Revs.... the audits and controls... etc. It woulkd be much more efficient and less problematic to embed the Cal Exec in the Main VI. Is it possible to do what we want? Can I dynamically load Cal Exec.... do my Cal... then close Cal Exec from my main VI, the same way I started it??? I have tried to do it using ActiveX, but I am "ActiveX Challenged".... in other words, I really don't know what I am doing with it. Thanks for your help.