Open windows after using NetWebClient

[mjusic]

I have a program that detects open windows when performing a specific task.
I added a procedure that sends some json data with netWebClient.
After that call there is an additional window left open (hidden?).
How can I close it or how can I detect it?

The code to check open windows:


!Window1              &WINDOW
!Window2              &WINDOW
     
WO# = false     
Window1 &= System{PROP:Target}     
loop J# = 1 to 64
   SetTarget(,J#) 
   Window2 &= System{PROP:Target}
   if not Window2 &= Window1
      WO# = true
      break
   end
end
SetTarget()

if WO# = true
   message('open window detected')
end

[mjusic]

Found it !

It's the "NetTalk DLL WinSock Call Back Window" that stays open.

Closed it with  NetCloseCallBackWindow() after the ThisWebClient.Kill()