Invalid cast (mshtml.IHTMLIn putImage)

[nara]

Hello

I have a problem with this code :
It throw the "System.Invalid CastException" exception.

I use mshtml.dll.

SomeOne could explain me why ?

For advance thanks...

JP

Message="Unable to cast COM object of type
'mshtml.HTMLInp utElementClass' to interface type
'mshtml.IHTMLIn putImage'. This operation failed because the
QueryInterface call on the COM component for the interface with IID
'{3050F2C2-98B5-11CF-BB82-00AA00BDCE0B}' failed due to the following
error: Cette interface n'est pas prise en charge (Exception from
HRESULT: 0x80004002 (E_NOINTERFACE) )."
Source="Microso ft.mshtml"

{
webBrowser1.Nav igate("http://www.google.com" );
while ((webBrowser1.I sBusy) || (webBrowser1.Re adyState !=
WebBrowserReady State.Complete) )
{ Application.DoE vents(); };
for (int j = 0; j <= webBrowser1.Doc ument.All.Count - 1; j++)
{
object obj;
mshtml.IHTMLInp utImage intf;
obj = webBrowser1.Doc ument.All[j].DomElement;

if (obj is mshtml.IHTMLInp utImage)
{

intf = (obj as mshtml.IHTMLInp utImage);
Debug.Assert(in tf!=null);

MessageBox.Show (intf.name); // <-- This throw an exception
}
}

}