or Cancel Button - Clicking this button closes the dialog without saving edits made since the last save or without taking the next action.
Delete Button - Clicking this button immediately deletes the current record represented by the dialog. Clicking this button at the top of the Define Reminder Dialog, for example, immediately deletes the reminder.
OK Button - Clicking this button closes the dialog and takes the next action.
Save & Exit Button - Clicking this button saves the data in the dialog and closes it.
Save Button - Clicking this button saves the data in the dialog without closing it.
or 
Cancel Button - Clicking this button closes the dialog without saving edits made since the last save or without taking the next action.
Delete Button - Clicking this button immediately deletes the current record represented by the dialog. Clicking this button at the top of the 
OK Button - 
Save & Exit Button - Clicking this button saves the data in the dialog and closes it.
Save Button - Clicking this button saves the data in the dialog without closing it.