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**BeforeChange(**//filename//**,** //BFP//**), VIRTUAL**

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| **BeforeChange** | Update the Audit log file before any file update |
| //filename// | A string constant, variable, EQUATE, or expression containing the label of the file that is to be audited. |
| //BFP// | The label of a BufferedPairsClass object. See //BufferedPairsClass //for more information. |

The **BeforeChange **method saves the values of the record before a change is made. These values are used for comparison after the record is saved back to disk.

**Implementation:**

The BeforeChange method sets the Action property and saves the current field values to the log file. This method is called from the DbChangeManager.CheckChanges method.

**See Also:**     [[bufferedpairsclass.htm|BufferedPairsClass]], [[checkchanges check record for changes .htm|DbChangeManager.CheckChanges]]