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Tip of the Day
Language: Visual Basic
Expertise: Advanced
Apr 23, 1999

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Is the Active Desktop Active?

Sometimes you want to know if the desktop is in Active Desktop mode-for example, to set an HTML wallpaper. I couldn't find a function to accomplish this, but this hack works on all Windows 95/98 and NT4 desktops that I've tested it on:
 
Private Declare Function FindWindow& Lib "user32" Alias _
	"FindWindowA" (ByVal lpClassName$, ByVal lpWindowName$)
Private Declare Function FindWindowEx& Lib "user32" Alias _
	"FindWindowExA" (ByVal hWndParent&, ByVal _
	hWndChildAfter&, ByVal lpClassName$, ByVal _
	lpWindowName$)

Public Function IE4ActiveDesktop() As Boolean
	Dim Templong&
	Templong = FindWindow("Progman", vbNullString)
	Templong = FindWindowEx(Templong, 0&, _
		"SHELLDLL_DefView", vbNullString)
	Templong = FindWindowEx(Templong, 0&, _
		"Internet Explorer_Server", vbNullString)
	If Templong > 0 Then
		IE4ActiveDesktop = True
	Else
		IE4ActiveDesktop = False
	End If
End Function
Don Bradner
 
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