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How to register a dll from visual basic application.

Posted on 2001-09-04
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Last Modified: 2013-11-25
i created a simple project using visual basic 6.0 .
Here i want to register a dll (given the path of dll). I am trying to use
regsvr32 "C:\ABC\ABCDLL.dll"
but it's not working. I am looking in the msdn help but not getting any hint. Any help will be appreciated.
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Question by:nkunapaneni
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by:Dave_Greene
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Try

Shell regsvr32.exe "C:\ABC\ABCDLL.dll"
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bobbit31 earned 100 total points
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Try this:

Public Declare Function GetProcAddress _
  Lib "kernel32" _
  (ByVal hModule As Long, _
   ByVal lpProcName As String) _
  As Long

Public Declare Function LoadLibrary _
   Lib "kernel32" Alias "LoadLibraryA" _
   (ByVal lpLibFileName As String) As Long

Public Declare Function CreateThread Lib "kernel32" _
(lpThreadAttributes As Long, ByVal dwStackSize As Long, _
lpStartAddress As Long, lpParameter As Any, ByVal dwCreationFlags As Long, _
lpThreadId As Long) As Long

Public Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds
As Long) As Long
Public Declare Function GetExitCodeThread Lib "kernel32" (ByVal hThread As Long, lpExitCode As Long)
As Long
Public Declare Sub ExitThread Lib "kernel32" (ByVal dwExitCode As Long)
Public Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Public Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As Long) As Long

Function VBRegSvr32(ByVal sServerPath As String, _
                                          Optional fRegister = True) As Boolean
Dim hMod As Long            ' module handle
Dim lpfn As Long            ' reg/unreg function address
Dim lpThreadId As Long      ' dummy var that get's filled
Dim hThread As Long         ' thread handle
Dim fSuccess As Boolean     ' if things worked
Dim dwExitCode As Long      ' thread's exit code if it doesn't finish

   Screen.MousePointer = vbHourglass

   ' Load the server into memeory
   hMod = LoadLibrary(sServerPath)
       
   ' Get the specified function's address and our msgbox string.
   If fRegister Then
       lpfn = GetProcAddress(hMod, "DllRegisterServer")
   Else
       lpfn = GetProcAddress(hMod, "DllUnregisterServer")
   End If
     
   ' If we got a function address...
   If lpfn Then
       ' Create an alive thread and execute the function.
       hThread = CreateThread(ByVal 0, 0, ByVal lpfn, ByVal 0, 0, lpThreadId)
         
       ' If we got the thread handle...
       If hThread Then
           ' Wait 10 secs for the thread to finish (the function may take a while...)
           fSuccess = (WaitForSingleObject(hThread, 10000) = WAIT_OBJECT_0)
           
           ' If it didn't finish in 5 seconds...
           If Not fSuccess Then
               ' Something unlikely happened, lose the thread.
               Call GetExitCodeThread(hThread, dwExitCode)
               Call ExitThread(dwExitCode)
           End If
     
       ' Lose the thread handle
       Call CloseHandle(hThread)
       End If   ' hThread
   End If   ' lpfn
     
   ' Free server if we loaded it.
   If hMod Then Call FreeLibrary(hMod)
     
   Screen.MousePointer = vbDefault
     
   If fSuccess Then
       VBRegSvr32 = True
   Else
       MsgBox ("Error: " & sServerPath)
       VBRegSvr32 = False
   End If
   
End Function
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Expert Comment

by:bobbit31
Comment Utility
you would obviously then do:

VBRegSvr32 "C:\ABC\ABCDLL.dll" to register

and

VBRegSvr32 "C:\ABC\ABCDLL.dll", false to unregister
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Expert Comment

by:PaulHews
Comment Utility
Bobbit, where did you find that code?  It is identical to something I posted a long time ago, but I have no idea where I found it.
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by:mlmcc
Comment Utility
listening
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by:Ryan Chong
Comment Utility
<me too..>
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Expert Comment

by:bobbit31
Comment Utility
i don't know, i found it somewhere too.  It was a post from someone on ee so it could've been from your post ;)
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Expert Comment

by:KRITGuy
Comment Utility
Thank you for posting.  I needed this.

Cheers,
Kevin
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Expert Comment

by:roycarson
Comment Utility
What is the  WAIT_OBJECT_0      value in the above code? It looks just what I need.
Cheers Roy
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