DllCall - GetWindow help needed

[bluebearr 0]

I'm trying to write a script to close all open Explorer windows. (This is useful if you are installing a networking component and have folders on network shares open - avoids the error that the resource can't be reached.) I'm using AutoIt 3.1.0.15.

The problem I'm having is that if I have more than 4 windows, not all the windows close. I did a little debugging, and the issue seems to be that my test for when I reach the end of all the windows isn't correct. In the script below, I test for when $TestWin equals "00000000", but this doesn't seem to work properly - I seem to get this value before all the windows have been tested. The Win32 API documentation I have says

If no window exists with the specified relationship to the specified window, the return value is NULL.

but I'm not sure how to test for that. Any help is appreciated.

Here is the script:

Func CloseExplorerWins()
  Const $BufferLen = 250, $GW_HWNDNEXT = 2, $GW_CHILD = 5
  Local $FirstWin, $RetClass, $WinClass, $WinTitle, $userDll, $DesktopWin, $TestWin
  $userDll = DllOpen ( "User32.dll" )
  $DesktopWin = DllCall( $userDll, "hwnd", "GetDesktopWindow")
  $FirstWin = DllCall( $userDll, "hwnd", "GetWindow", "hwnd", $DesktopWin[0], "long", $GW_CHILD)
  $TestWin = $FirstWin[0] & ""
  While $TestWin <> "00000000"
    $RetClass = DllCall( $userDll, "int", "GetClassName", "hwnd", $FirstWin[0], "str", $WinClass, "int", $BufferLen)
    If $RetClass[2] = "CabinetWClass" Then
      $RetVal = DllCall( $userDll, "short", "PostMessage", "hwnd", $FirstWin[0], "int", 16, "long", 0, "long", 0)
    EndIf
    $FirstWin = DllCall( $userDll, "hwnd", "GetWindow", "hwnd", $FirstWin[0], "long", $GW_HWNDNEXT)
    $TestWin = $FirstWin[0] & ""
  WEnd
  DllClose( $userDll)
EndFunc

Thanks a lot!

BlueBearr

[Ejoc 0]

$TestWin = $FirstWin[0]

While $TestWin <> 0

[bshoenhair 0]

Quick and dirty but it will close all open windows of explorer

Tested on winXP Pro

Opt('WinTitleMatchMode',4)

While WinExists('classname=ExploreWClass') Or WinExists('classname=CabinetWClass')
    WinClose('classname=ExploreWClass') 
    WinClose('classname=CabinetWClass')
    Sleep(1)
WEnd

[bluebearr 0]

Dang, that's slick. Thanks, quick and dirty works for me!

Now I gotta find another reason to play with DllCall...

BlueBearr

[bluebearr 0]

$TestWin = $FirstWin[0]

While $TestWin <> 0

<{POST_SNAPBACK}>

I tried this and it didn't work - it would never exit the loop. That's why I used the "00000000" value.

BlueBearr

[Ejoc 0]

I tried this and it didn't work - it would never exit the loop.  That's why I used the "00000000" value.

BlueBearr

<{POST_SNAPBACK}>

Then the function doesn't return NULL