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Dynamically registering DLLs

Posted on 2004-09-03
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Last Modified: 2010-05-02
I can't remember where I got the code below from, but it's my only example of how to programmatically register a dll.  However, if the name of the dll is to be passed to the function at runtime, how do I get it to register without declaring the dll as a function?



'function to call to register the ActiveX
Private Declare Function RegComCtl32 Lib "COMCTL32.OCX" Alias _
    "DllRegisterServer" () As Long

' function to call to unregister the ActiveX
Private Declare Function UnRegComCtl32 Lib "COMCTL32.OCX" Alias _
    "DllUnregisterServer" () As Long
Const ERROR_SUCCESS = &H0

'Note that the two functions work only if the DLL is in the system path or in the current directory.
'Therefore, if you want to register a DLL located elsewhere on your hard disk, you must use ChDrive
'and ChDir commands to make that directory the current one. For example, say that the you
'have a Test.DLL file in the C:\MyApp directory. Here's the code you need to register it:
Private Declare Function RegisterTestDLL Lib "Test.Dll" Alias _
    "DllRegisterServer" () As Long
Dim retCode As Long

On Error Resume Next

' move to the DLL's directory
ChDrive "C:"
ChDir "C:\MyApp"
' register the DLL
retCode = RegisterTestDLL()

If Err <> 0 Then
    ' probably the DLL isn't there
    MsgBox "Unable to find the Test.Dll file"
ElseIf retCode <> ERROR_SUCCESS Then
    ' the registration run and failed
    MsgBox "Registration failed"
End If
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Question by:kinton
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JR2003 earned 1000 total points
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by:mladenovicz
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Expert Comment

by:mladenovicz
ID: 11970954
JR2003 was faster
;)
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by:kinton
ID: 11971545
Cool, thanks guys - just testing it with my program....
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by:kinton
ID: 12224995
Well it works on my machine!  Sending it out to about 40 reps should be the ultimate test though!

Thanks for the link.
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