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How to tell if a dll is registered

Posted on 2002-04-30
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Last Modified: 2008-10-16
How can I tell for sure if a dll is registered? Without unregistering it to check if it unregisters.
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Question by:alaplume
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5 Comments
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 6981853
You can search for it in the registry.

Anthony
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LVL 15

Accepted Solution

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ameba earned 100 total points
ID: 6982243
Option Explicit
Private Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal _
   lpLibFileName As String) As Long
Private Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As Long) As Long
 
Private Sub Form_Click()
   If IsDLLAvailable("SHDOCVW.dll") Then
       MsgBox "OK"
   Else
       Beep
       ' MsgBox ApiErrorText(Err.LastDllError)
       ' for ApiErrorText, see: http://www.mvps.org/vb/index2.html?tips/formatmessage.htm
   End If
End Sub

Function IsDLLAvailable(ByVal DllFilename As String) As Boolean
   Dim hModule As Long
   
   ' attempt to load the module
   hModule = LoadLibrary(DllFilename)
   If hModule > 32 Then
       FreeLibrary hModule ' decrement the DLL usage counter
       IsDLLAvailable = True
   End If
End Function
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by:Moondancer
ID: 6985944
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Moondancer - EE Moderator
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Expert Comment

by:Computer101
ID: 6987758
Based on review and feedback from other moderators, the grade is changed.

Please see below.

Computer101
E-E Moderator



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Expert Comment

by:ragmanintx
ID: 23179957
Register DLLs
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