Depending on the context of your question there are at least two ways to do that.
1) If you are deploying your application, and running under the LabVIEW development environment and want to keep the end users from aborting the execution with the Abort button, you can just change the VI mode from "EDIT" to "RUN" by going to the Operate menu then selecting the Change to Run Mode option. A CTRL+M keystroke will work for that as well.
2) If you are removing in from the dialog that appears you can de-select the "Show Abort Button" option under the customize window appearance tab in VI properties.
Both of these methods, will make the Abort button unaccessable. Password locking the VI may also be necessary to prevent "unauthorized" re-activation of the Abort button.
Hope this helps
Jason
Wire Warrior
Behold the power of LabVIEW as my army of Roomba minions streaks across the floor!