DefaultWebOptions Object (Excel)
Contains global application-level attributes used by Microsoft Excel when you save a document as a Web page or open a Web page. You can return or set attributes either at the application (global) level or at the workbook level.
Workbook-level attribute settings override application-level attribute settings. Workbook-level attributes are contained in the WebOptions object.
Attribute values can be different from one workbook to another, depending on the attribute value at the time the workbook was saved.
Use the DefaultWebOptions property to return the DefaultWebOptions object. The following example checks to see whether PNG (Portable Network Graphics) is allowed as an image format and sets the strImageFileType variable accordingly.