否，很遗憾，这是不可能的. VSTO 2010不会编译为Office 2003设计的解决方案.它旨在与2007/2010一起使用.

No, unfortunately it's not possible. VSTO 2010 will not compile solutions designed for Office 2003. It is designed to work with with 2007/2010.

要为Office 2003创建解决方案，您将需要VS2003上的VSTO 2005或VS2008上的VSTO 2005 SE/VSTO 2008(对于后者，您也可以为Office 2007开发).

To create solutions for Office 2003 you'll need VSTO 2005 on VS2003 or VSTO 2005 SE / VSTO 2008 on VS2008 (in the case of the later, you can also develop for Office 2007).