发信人: winsy(鹰派)
整理人: winsy(2003-03-05 15:32:05), 站内信件
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原文转自CSDN
BOOL SetFileAttributes(
LPCTSTR lpFileName, // address of filename
DWORD dwFileAttributes // address of attributes to set
);
dwFileAttributes：
FILE_ATTRIBUTE_ARCHIVE
FILE_ATTRIBUTE_HIDDEN
FILE_ATTRIBUTE_NORMAL
FILE_ATTRIBUTE_OFFLINE
FILE_ATTRIBUTE_READONLY
FILE_ATTRIBUTE_SYSTEM
FILE_ATTRIBUTE_TEMPORARY
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SetAttr 语句
为一个文件设置属性信息。
语法
SetAttr pathname, attributes
SetAttr 语句的语法含有以下这些命名参数：
部分 描述
pathname 必要参数。用来指定一个文件名的字符串表达式，可能包含目录或文件夹、以及驱动器。
Attributes 必要参数。常数或数值表达式，其总和用来表示文件的属性。
设置值
attributes 参数设置可为：
常数 值 描述
vbNormal 0 常规（缺省值）
VbReadOnly 1 只读。
vbHidden 2 隐藏。
vbSystem 4 系统文件
vbArchive 32 上次备份以后，文件已经改变
注意 这些常数是由 VBA 所指定的，在程序代码中的任何位置，可以使用这些常数来替换真正的数值。
说明
如果想要给一个已打开的文件设置属性，则会产生运行时错误。
SetAttr 语句示例
本示例使用 SetAttr 语句来设置文件属性。
SetAttr "TESTFILE ", vbHidden ' 设置隐含属性。
SetAttr "TESTFILE ", vbHidden + vbReadOnly ' 设置隐含并只读。
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SetFileAttributes
VB声明
Declare Function SetFileAttributes Lib "kernel32 " Alias "SetFileAttributesA " (ByVal lpFileName As String, ByVal dwFileAttributes As Long) As Long
说明
设置文件属性
返回值
Long，非零表示成功，零表示失败。会设置GetLastError
参数表
参数 类型及说明
lpFileName String，要设置其属性的文件名
dwFileAttributes Long，带有FILE_ATTRIBUTE_??前缀的一个或多个常数
'Read and Write
Const MOVEFILE_REPLACE_EXISTING = &H1
Const FILE_ATTRIBUTE_TEMPORARY = &H100
Const FILE_BEGIN = 0
Const FILE_SHARE_READ = &H1
Const FILE_SHARE_WRITE = &H2
Const CREATE_NEW = 1
Const OPEN_EXISTING = 3
Const GENERIC_READ = &H80000000
Const GENERIC_WRITE = &H40000000
Private Declare Function SetVolumeLabel Lib "kernel32 " Alias "SetVolumeLabelA " (ByVal lpRootPathName As String, ByVal lpVolumeName As String) As Long
Private Declare Function WriteFile Lib "kernel32 " (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, lpNumberOfBytesWritten As Long, ByVal lpOverlapped As Any) As Long
Private Declare Function ReadFile Lib "kernel32 " (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, ByVal lpOverlapped As Any) As Long
Private Declare Function CreateFile Lib "kernel32 " Alias "CreateFileA " (ByVal lpFileName As String, ByVal dwDesiredAccess As Long, ByVal dwShareMode As Long, ByVal lpSecurityAttributes As Any, ByVal dwCreationDisposition As Long, ByVal dwFlagsAndAttributes As Long, ByVal hTemplateFile As Long) As Long
Private Declare Function CloseHandle Lib "kernel32 " (ByVal hObject As Long) As Long
Private Declare Function SetFilePointer Lib "kernel32 " (ByVal hFile As Long, ByVal lDistanceToMove As Long, lpDistanceToMoveHigh As Long, ByVal dwMoveMethod As Long) As Long
Private Declare Function SetFileAttributes Lib "kernel32 " Alias "SetFileAttributesA " (ByVal lpFileName As String, ByVal dwFileAttributes As Long) As Long
Private Declare Function GetFileSize Lib "kernel32 " (ByVal hFile As Long, lpFileSizeHigh As Long) As Long
Private Declare Function GetTempFileName Lib "kernel32 " Alias "GetTempFileNameA " (ByVal lpszPath As String, ByVal lpPrefixString As String, ByVal wUnique As Long, ByVal lpTempFileName As String) As Long
Private Declare Function MoveFileEx Lib "kernel32 " Alias "MoveFileExA " (ByVal lpExistingFileName As String, ByVal lpNewFileName As String, ByVal dwFlags As Long) As Long
Private Declare Function DeleteFile Lib "kernel32 " Alias "DeleteFileA " (ByVal lpFileName As String) As Long
Private Sub Form_Load()
'KPD-Team 1998
'URL: http://www.allapi.net/
'E-Mail: [email protected]
Dim sSave As String, hOrgFile As Long, hNewFile As Long, bBytes() As Byte
Dim sTemp As String, nSize As Long, Ret As Long
'Ask for a new volume label
sSave = InputBox( "Please enter a new volume label for drive C:\ " + vbCrLf + " (if you don't want to change it, leave the textbox blank) ")
If sSave < > " " Then
SetVolumeLabel "C:\ ", sSave
End If
'Create a buffer
sTemp = String(260, 0)
'Get a temporary filename
GetTempFileName "C:\ ", "KPD ", 0, sTemp
'Remove all the unnecessary chr$(0)'s
sTemp = Left$(sTemp, InStr(1, sTemp, Chr$(0)) - 1)
'Set the file attributes
SetFileAttributes sTemp, FILE_ATTRIBUTE_TEMPORARY
'Open the files
hNewFile = CreateFile(sTemp, GENERIC_WRITE, FILE_SHARE_READ Or FILE_SHARE_WRITE, ByVal 0&, OPEN_EXISTING, 0, 0)
hOrgFile = CreateFile( "c:\config.sys ", GENERIC_READ, FILE_SHARE_READ Or FILE_SHARE_WRITE, ByVal 0&, OPEN_EXISTING, 0, 0)
'Get the file size
nSize = GetFileSize(hOrgFile, 0)
'Set the file pointer
SetFilePointer hOrgFile, Int(nSize / 2), 0, FILE_BEGIN
'Create an array of bytes
ReDim bBytes(1 To nSize - Int(nSize / 2)) As Byte
'Read from the file
ReadFile hOrgFile, bBytes(1), UBound(bBytes), Ret, ByVal 0&
'Check for errors
If Ret < > UBound(bBytes) Then MsgBox "Error reading file ... "
'Write to the file
WriteFile hNewFile, bBytes(1), UBound(bBytes), Ret, ByVal 0&
'Check for errors
If Ret < > UBound(bBytes) Then MsgBox "Error writing file ... "
'Close the files
CloseHandle hOrgFile
CloseHandle hNewFile
'Move the file
MoveFileEx sTemp, "C:\KPDTEST.TST ", MOVEFILE_REPLACE_EXISTING
'Delete the file
DeleteFile "C:\KPDTEST.TST "
Unload Me
End Sub
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