'access API集中营 » 清除IE缓存
Option Compare Database
Option Explicit
Private Const ERROR_CACHE_FIND_FAIL As Long = 0
Private Const ERROR_CACHE_FIND_SUCCESS As Long = 1
Private Const ERROR_FILE_NOT_FOUND As Long = 2
Private Const ERROR_access_DENIED As Long = 5
Private Const ERROR_INSUFFICIENT_BUFFER As Long = 122
Private Const MAX_PATH As Long = 260
Private Const MAX_CACHE_ENTRY_INFO_SIZE As Long = 4096
Private Const LMEM_FIXED As Long = &H0
Private Const LMEM_ZEROINIT As Long = &H40
Private Const LPTR As Long = (LMEM_FIXED Or LMEM_ZEROINIT)
Private Const NORMAL_CACHE_ENTRY As Long = &H1
Private Const EDITED_CACHE_ENTRY As Long = &H8
Private Const TRACK_OFFLINE_CACHE_ENTRY As Long = &H10
Private Const TRACK_ONLINE_CACHE_ENTRY As Long = &H20
Private Const STICKY_CACHE_ENTRY As Long = &H40
Private Const SPARSE_CACHE_ENTRY As Long = &H10000
Private Const COOKIE_CACHE_ENTRY As Long = &H100000
Private Const URLHISTORY_CACHE_ENTRY As Long = &H200000
Private Const URLCACHE_FIND_DEFAULT_FILTER As Long = NORMAL_CACHE_ENTRY Or _
COOKIE_CACHE_ENTRY Or _
URLHISTORY_CACHE_ENTRY Or _
TRACK_OFFLINE_CACHE_ENTRY Or _
TRACK_ONLINE_CACHE_ENTRY Or _
STICKY_CACHE_ENTRY
Private Type FILETIME
dwLowDateTime As Long
dwHighDateTime As Long
End Type
Private Type INTERNET_CACHE_ENTRY_INFO
dwStructSize As Long
lpszSourceUrlName As Long
lpszLocalFileName As Long
CacheEntryType As Long
dwUseCount As Long
dwHitRate As Long
dwSizeLow As Long
dwSizeHigh As Long
LastModifiedTime As FILETIME
ExpireTime As FILETIME
LastaccessTime As FILETIME
LastSyncTime As FILETIME
lpHeaderInfo As Long
dwHeaderInfoSize As Long
lpszFileExtension As Long
dwExemptDelta As Long
End Type
Private Declare Function FindFirstUrlCacheEntry Lib "wininet" _
Alias "FindFirstUrlCacheEntryA" _
(ByVal lpszUrlSearchPattern As String, _
lpFirstCacheEntryInfo As Any, _
lpdwFirstCacheEntryInfoBufferSize As Long) As Long
Private Declare Function FindNextUrlCacheEntry Lib "wininet" _
Alias "FindNextUrlCacheEntryA" _
(ByVal hEnumHandle As Long, _
lpNextCacheEntryInfo As Any, _
lpdwNextCacheEntryInfoBufferSize As Long) As Long
Private Declare Function FindCloseUrlCache Lib "wininet" _
(ByVal hEnumHandle As Long) As Long
Private Declare Function DeleteUrlCacheEntry Lib "wininet" _
Alias "DeleteUrlCacheEntryA" _
(ByVal lpszUrlName As String) As Long
Private Declare Sub CopyMemory Lib "kernel32" _
Alias "RtlMoveMemory" _
(pDest As Any, _
pSource As Any, _
ByVal dwLength As Long)
Private Declare Function lstrcpyA Lib "kernel32" _
(ByVal RetVal As String, ByVal Ptr As Long) As Long
Private Declare Function lstrlenA Lib "kernel32" _
(ByVal Ptr As Any) As Long
Private Declare Function LocalAlloc Lib "kernel32" _
(ByVal uFlags As Long, _
ByVal uBytes As Long) As Long
Private Declare Function LocalFree Lib "kernel32" _
(ByVal hMem As Long) As Long
Public Sub ClearIECache()
Dim icei As INTERNET_CACHE_ENTRY_INFO
Dim hFile As Long
Dim cachefile As String
Dim posUrl As Long
Dim posEnd As Long
Dim dwBuffer As Long
Dim pntrICE As Long
hFile = FindFirstUrlCacheEntry(0&, ByVal 0, dwBuffer)
If (hFile = ERROR_CACHE_FIND_FAIL) And _
(Err.LastDllError = ERROR_INSUFFICIENT_BUFFER) Then
pntrICE = LocalAlloc(LMEM_FIXED, dwBuffer)
If pntrICE <> 0 Then
CopyMemory ByVal pntrICE, dwBuffer, 4
hFile = FindFirstUrlCacheEntry(vbNullString, _
ByVal pntrICE, _
dwBuffer)
If hFile <> ERROR_CACHE_FIND_FAIL Then
Do
CopyMemory icei, ByVal pntrICE, Len(icei)
If (icei.CacheEntryType And _
NORMAL_CACHE_ENTRY) = NORMAL_CACHE_ENTRY Then
cachefile = GetStrFromPtrA(icei.lpszSourceUrlName)
If Left(cachefile, 8) <> "Visited:" Then
Debug.Print cachefile
DeleteUrlCacheEntry cachefile
End If
End If
dwBuffer = 0
Call FindNextUrlCacheEntry(hFile, ByVal 0, dwBuffer)
pntrICE = LocalAlloc(LMEM_FIXED, dwBuffer)
CopyMemory ByVal pntrICE, dwBuffer, 4
Loop While FindNextUrlCacheEntry(hFile, ByVal pntrICE, dwBuffer)
End If 'hFile
End If 'pntrICE
End If 'hFile
Call LocalFree(pntrICE)
Call FindCloseUrlCache(hFile)
End Sub
Private Function GetStrFromPtrA(ByVal lpszA As Long) As String
GetStrFromPtrA = String$(lstrlenA(ByVal lpszA), 0)
Call lstrcpyA(ByVal GetStrFromPtrA, ByVal lpszA)
End Function
调用方法：
Call ClearIECache
