IHTMLElement dropdown = (IHTMLElement) htmlDocument.all.item("comboselections", null); dropdown.innerHTML = "<OPTION value=1>Selection 1</OPTION><OPTION value=2>Selection 2</OPTION>;but all I end up with is an empty, narrow drowdown. "comboselections" is the ID that I assigned to the SELECT input. "htmlDocument" is a reference to the HTML document that I am displaying in the browser.