the following command will change the margins

loword.Filepagesetup(,,"0.4 in","0.5 in","0.6 in","0.8 in",,,,,,,,,,,,,,,,,,,,)

FilePageSetup [.Tab = number] [, .TopMargin = number or text] [, .BottomMargin = number or text] [, .LeftMargin = number or text] [, .RightMargin = number or text] [, .Gutter = number or text] [, .PageWidth = number or text] [, .PageHeight = number or text] [, .Orientation = number] [, .FirstPage = number] [, .OtherPages = number] [, .VertAlign = number] [, .ApplyPropsTo = number] [, .Default] [, .FacingPages = number] [, .HeaderDistance = number or text] [, .FooterDistance = number or text] [, .SectionStart = number] [, .OddAndEvenPages = number] [, .DifferentFirstPage = number] [, .Endnotes = number] [, .LineNum = number] [, .StartingNum = number] [, .FromText = number or text] [, .CountBy = number] [, .NumMode = number])