Startup Actions property
This is where you specify the action(s) that must be executed BEFORE the selected window is created on the screen (i.e. when it is opened from the menu, not when it is de-iconized.) This is useful for data manipulation purposes.
If you want to have a query performed when the window is opened, use the Post-open property instead. (The actions will then be performed AFTER the window has been created, making the result visible to the end user).
For more information on when this property is handled relative to other similar properties, please refer to the help index entries on Events.