Why Invoke ShellExecute in a installer get SE_ERR_ACCESSDENIED?

From: bassil (bassil_at_discussions.microsoft.com)
Date: 08/22/05 

Date: Mon, 22 Aug 2005 08:51:21 -0700

hi,

I invoke ShellExecute in a installer class return ok when pass in a local
folder.
However I always get SE_ERR_ACCESSDENIED if pass in a url?

[DllImport("shell32.dll")]
public static extern int ShellExecute(IntPtr hWnd,
                string lpszOp, string lpszFile,
                string lpszParams, string lpszDir,int FsShowCmd);

nRet = ShellExecute((IntPtr)0, "OPEN", "c:\\dir",null, null, 1);

return ok, how ever following always get SE_ERR_ACCESSDENIED

nRet = ShellExecute((IntPtr)0, "OPEN",
"http://localhost/aspnetsamples",null, null, 1);

any idea?

Thanks in advance!

Bassil