Not supported. Attempts to diagnose problems with the network connection.
No return value.
Permission denied (0x80070005) Method is not allowed from the current page.
DiagnoseConnection was introduced in Windows Internet Explorer 7.
To successfully complete this operation, the Network Diagnostic for Windows XP extension must be installed. On Windows Vista, the Network Diagnostics Framework is used.
This method can only be called from the "res://ieframe.dll/dnserror.htm" resource page.