Navigation: ABC Library Reference > FileManager > FileManager Methods >====== EqualBuffer (detect record buffer changes)  ====== |    |
EqualBuffer( buffer id ), VIRTUAL
| EqualBuffer | Compares the managed file's record buffer with the specified buffer and returns a value indicating whether the buffers are equal. |
| buffer id | An integer constant, variable, EQUATE, or expression that identifies the buffer contents to compare–typically a value returned by the SaveBuffer method. |
The EqualBuffer method compares the managed file's record buffer, including any MEMOs or BLOBs, with the specified buffer and returns a value indicating whether the buffers are equal. A return value of one (1 or True) indicates the buffers are equal; a return value of zero (0 or False) indicates the buffers are not equal. Assigning PROP:Handle on a BLOB field constitutes a change to the BLOB and will cause EqualBuffer() to return False.
Return Data Type: BYTE
Example:
MyWindowManager.TakeCloseEvent PROCEDURE
CODE
IF SELF.Response = RequestCancelled !if end user cancelled the form
IF ~SELF.Primary.Me.EqualBuffer(SELF.Saved) !check for any pending changes
!handle cancel of pending changes
END
END
See Also: SaveBuffer