access利用API函数复制文件

Access中，经常需要对后台数据库文件进行备份。

这里我们使用API函数复制文件，可复制正打开状态的文件,可以作为复制备份后台mdb文件,不用断开对库的连接

详细函数：

将代码放在模块中,然后调用 ShellFileCopy 函数

Option Explicit
Private Type SHFILEOPSTRUCT
hwnd As Long
wFunc As Long
pFrom As String
pTo As String
fFlags As Integer
fAnyOperationsAborted As Long
hNameMappings As Long
lpszProgressTitle As String
End Type
Private Declare Function SHFileOperation Lib "shell32.dll" _
Alias "SHFileOperationA" (lpFileOp As SHFILEOPSTRUCT) As Long
Private Const FOF_ALLOWUNDO = &H40
Private Const FOF_NOCONFIRMATION = &H10
Private Const FO_COPY = &H2

Public Function ShellFileCopy(src As String, dest As String, _
Optional NoConfirm As Boolean = False) As Boolean
'PURPOSE: COPY FILES VIA SHELL API
'THIS DISPLAYS THE COPY PROGRESS DIALOG BOX
'PARAMETERS: src: Source File (FullPath)
'dest: Destination File (FullPath)
'NoConfirm (Optional): If set to
'true, no confirmation box
'is displayed when overwriting
'existing files, and no
'copy progress dialog box is
'displayed

'Returns (True if Successful, false otherwise)

'EXAMPLE: 
'dim bSuccess as boolean
'bSuccess = ShellFileCopy ("C:\MyFile.txt", "D:\MyFile.txt")
Dim WinType_SFO As SHFILEOPSTRUCT
Dim lRet As Long
Dim lflags As Long
lflags = FOF_ALLOWUNDO
If NoConfirm Then lflags = lflags & FOF_NOCONFIRMATION
With WinType_SFO
.wFunc = FO_COPY
.pFrom = src
.pTo = dest
.fFlags = lflags
End With
lRet = SHFileOperation(WinType_SFO)
ShellFileCopy = (lRet = 0)
End Function