Posted on 2004-03-21
Last Modified: 2010-08-05

When I use URLDownloadToCacheFile in my VB Code, I receive the following error:

DLL-Entry Point URLDownloadToCacheFile in URLMON.dll not found

My system is Windows 2000 Professional. urlmon.dll is very likely the most recent version, since it just got updated during a Windows Update (got the same error before the update).
Version Number: 6.0.2800.1400

To make things more confusing: URLDownloadToFile works without a problem, EVEN when I UNREGISTER c:\winnt\system32\urlmon.dll ! How is that possible?

Thanks for your help.
Question by:_Mark_
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LVL 22

Expert Comment

ID: 10643483
It works, and gives you that message?

Could you post the code...

Author Comment

ID: 10643523
Well, URLDownloadToFile works, but URLDownloadToCacheFile doesn´t.


Private Declare Sub URLDownloadToCacheFile Lib "URLMON.dll" ( _
    ByVal lpunknown As Long, _
    ByVal lpcstr As String, _
    ByVal lptstr As String, _
    ByVal dword As Long, _
    ByVal dword As Long, _
Private Sub Test()
   Dim url As String
   Dim localFileName As String
   On Error GoTo trackError
   url = ""
   localFileName = Space(255)
   URLDownloadToCacheFile 0, url, localFileName, Len(localFileName), 0, 0

Debug.Print Err.Description

End Sub

Author Comment

ID: 10643599
Found the solution to my problem. Have to use an alias in the API declaration. This works:

Private Declare Function URLDownloadToCacheFile Lib "urlmon" Alias "URLDownloadToCacheFileA" ( _
   ByVal lpUnkcaller As Long, _
   ByVal szURL As String, _
   ByVal szFileName As String, _
   ByVal dwBufLength As Long, _
   ByVal dwReserved As Long, _
   ByVal IBindStatusCallback As Long) As Long
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LVL 22

Expert Comment

ID: 10644244
Yup, that's pretty common.

Go to Community Supprt, tell them you solved it yourself, and would they please delete the question and refund the points.


Author Comment

ID: 10644369
Okay, thanks for your help though!

Accepted Solution

amp072397 earned 0 total points
ID: 10644576
Since the only other expert participating obviously agrees to PAQ:
PAQ, refund 250 points
amp, ee admin

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