ocx控件里能添加背景图片么？

[追豆豆的人]

<object id="sheet" name="sheet" height="440" width="100%" classid="CLSID:0002E559-0000-0000-C000-000000000046"
viewastext>
<param name="DataType" value="XMLDATA" />
<param name="HTMLURL" value="ShowFile\MonthFC.htm" />
<param name="HtmlData" value='' />
<param name="AllowPropertyToolbox" value="-1" />
<param name="AutoFit" value="0" />
<param name="Calculation" value="-4105" />
<param name="Caption" value="Microsoft Office 电子表格" />
<param name="DisplayColumnHeadings" value="1" />
<param name="DisplayGridlines" value="1" />
<param name="DisplayHorizontalScrollBar" value="-1" />
<param name="DisplayOfficeLogo" value="0" />
<param name="DisplayPropertyToolbox" value="0" />
<param name="DisplayRowHeadings" value="1" />
<param name="DisplayTitleBar" value="0" />
<param name="DisplayToolbar" value="0" />
<param name="DisplayVerticalScrollBar" value="-1" />
<param name="DisplayWorkbookTabs" value="-1" />
<param name="EnableEvents" value="-1" />
<param name="MaxHeight" value="300" />
<param name="MaxWidth" value="100%" />
<param name="MoveAfterReturn" value="-1" />
<param name="MoveAfterReturnDirection" value="-4121" />
<param name="RightToLeft" value="0" />
<param name="ScreenUpdating" value="-1" />
<param name="LockedDown" value="0" />
<param name="ConnectedToChart" value="0" />
<param name="DefaultQueryOnLoad" value="-1" />
<param name="EnableUndo" value="-1" />
</object>
想在里面添加个背景图片？请问是哪个属性？