Do not attempt to open any dialog box. This operation is performed by the application or operating system automatically when needed in a query some data from the user.
Determine whether you want to save changes in application configuration or operating system before executing the dialog box is closed.
Press the button with the "x" in the upper right corner of the window in the title bar without having to save the selected changes. An alternative way to close the dialog box in such cases is to press the function key Esc.
Click OK to save the changes to the application settings or operating system. An alternative way to close the dialog box in such cases is to press the function key Enter.
Use the "Apply" button (if available) to save the selected changes in the parameters of the application or the operating system.
Remember that the choices made by the user takes effect only after closing the dialog box, which allows you to avoid hasty or erroneous decisions.
Use the button with the "x" in the upper right corner of the window with the disappearance of the OK button. This behavior can be caused by the need for immediate applications changes the selected parameters. Use the button to shutdown in such cases means that the settings been irreversibly changed and restore previous settings will not be executed.
Use the buttons "Yes" and "No" to confirm or deny a given application or operating system issue.
Use the "Help" button for more information on the proposed action to change the settings.
Select the "Cancel" button to cancel the action that caused the dialog box. In this window you will see is closed, and the application settings or operating system restored.
Alternative to buttons "Yes" and "No" can serve as keyboard accelerators Y and N.