Windows XP --> Windows XP 2002 (SP2)
Excel version --> Microsoft Office Professional Edition 2007
.Net version --> Microsoft .NET Framework 3.5
Programming Language--> C#
IDE --> Visual Studio Team Suite 2008
Microsoft Visual Studio Tools for Microsoft Office Runtime --> VSTO 3.0
When a web page is launched from an Excel 2007 document level solution using the .NET Web Browser Control (WBC), the Z-index of the rendered page is not correct.
Select controls (like html drop-down lists) are still visible even after disabling (graying out) the whole page.
This does not happen when the WBC is used inside a regular Windows Form Application. In this case, the page behaves as expected and the drop-down lists are NOT active.
I have attached two applications and a document in "ExcelWebBrowserTest.zip". The problem happens only in "ExcelWebBrowserTest.zip". But, "WBC_NO_EXCEL.zip" can be run to see the expected behavior.