UpdBackground Method
The UpdBackground method forces a change to the background of a form.
This method has the following syntax:
table_field[index].column_field.UpdBackground()
Use this method to refresh the display of a form after you have changed the contents of the BitmapObject object referenced by the BgBitmap attribute. Invoke the UpdBackground method only when the background pattern is FP_BITMAP and the BgBitmap attribute itself has not changed.