I open a browser from my program like this:

strUrl = "http://www............ ""

lngScanDocPId = Shell("C:\Program\Internet Explorer\iexplore.exe " & strUrl, vbMaximizedFocus) '

I can close that window, but if the user close it this code result in an error:

If lngScanDocPId <> 0 Then
AppActivate lngScanDocPId
SendKeys "%{F4}", True
lngScanDocPId = 0
End If

Can I see if the window is alive...?