In the Execute tab in the Object palette, you can select a data connection for the button and specify whether the associated processing will be carried out on the client computer, the server, or both. The data connection must provide access to a web-service interface or OLEDB database server that will either return data to the form at run time or perform an action elsewhere.After you specify the data source (see About data sources), you can specify the operation or query to run. When the button is clicked at run time, processing is completed as defined through the operation or query.Returned data can be merged with the form so that only data associated with existing objects is overwritten without refreshing the structure of the form. Alternatively, you can choose to update the structure of the form based on the returned XML data. In this case, the structure of the form is updated, and the returned data is merged after processing is completed.To define processing options for a button, you must first select the button. The processing options are set in the Execute tab of the Object palette. To view the Execute tab, the Execute option must be selected in the Control Type area in the Field tab.