当从“资源管理器”复制/剪贴文件时,文件列表会被存放到“剪贴板”Clipboard。可以用下面的程序获取得这时的文件列表,包括是“复制”还是“剪贴”的情况。
在VB里面新建一个类模块,添加如下的代码即可。
'//本文由 Virtualalloc 原创,转载请注明出处。
Private Type POINTAPI x As Long y As Long End Type
Private Type DROPFILES pFiles As Long pt As POINTAPI fNC As Long fWide As Long End Type
'//global memory Private Declare Function GlobalAlloc Lib "kernel32" (ByVal wFlags As Long, ByVal dwBytes As Long) As Long Private Declare Function GlobalFree Lib "kernel32" (ByVal hMem As Long) As Long Private Declare Function GlobalLock Lib "kernel32" (ByVal hMem As Long) As Long Private Declare Function GlobalUnlock Lib "kernel32" (ByVal hMem As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (pDest As Any, pSrc As Any, ByVal ByteLen As Long)
'clipboard Private Declare Function SetClipboardData Lib "user32" (ByVal wFormat As Long, ByVal hMem As Long) As Long Private Declare Function EmptyClipboard Lib "user32" () As Long Private Declare Function RegisterClipboardFormat Lib "user32" Alias "RegisterClipboardFormatA" (ByVal lpString As String) As Long Private Declare Function IsClipboardFormatAvailable Lib "user32" (ByVal wFormat As Long) As Long Private Declare Function OpenClipboard Lib "user32" (ByVal hwnd As Long) As Long Private Declare Function GetClipboardData Lib "user32" (ByVal wFormat As Long) As Long Private Declare Function CloseClipboard Lib "user32" () As Long Private Declare Function DragQueryFile Lib "shell32.dll" Alias "DragQueryFileA" (ByVal hDrop As Long, ByVal iFile As Long, ByVal lpszFile As String, ByVal cch As Long) As Long
Public Enum FileDropEffectConstants fdDropEffectNone = 0 fdDropEffectCopy = 1 fdDropEffectMove = 2 fdDropEffectLink = 4 End Enum
'//Clipboard Formats Private Const CF_TEXT = 1 Private Const CF_BITMAP = 2 Private Const CF_METAFILEPICT = 3 Private Const CF_SYLK = 4 Private Const CF_DIF = 5 Private Const CF_TIFF = 6 Private Const CF_OEMTEXT = 7 Private Const CF_DIB = 8 Private Const CF_PALETTE = 9 Private Const CF_PENDATA = 10 Private Const CF_RIFF = 11 Private Const CF_WAVE = 12 Private Const CF_UNICODETEXT = 13 Private Const CF_ENHMETAFILE = 14 Private Const CF_HDROP = 15 Private Const CF_LOCALE = 16 Private Const CF_MAX = 17
'other clipboard formats Private Const CFSTR_SHELLIDLIST As String = "Shell IDList Array" Private Const CFSTR_SHELLIDLISTOFFSET As String = "Shell Object Offsets" Private Const CFSTR_NETRESOURCES As String = "Net Resource" Private Const CFSTR_FILEDESCRIPTOR As String = "FileGroupDescriptor" Private Const CFSTR_FILECONTENTS As String = "FileContents" Private Const CFSTR_FILENAME As String = "FileName" Private Const CFSTR_PRINTERGROUP As String = "PrinterFriendlyName" Private Const CFSTR_FILENAMEMAP As String = "FileNameMap"
Private Const CFSTR_PREFERREDDROPEFFECT As String = "Preferred DropEffect"
'global memory Private Const GMEM_FIXED = &H0 Private Const GMEM_MOVEABLE = &H2 Private Const GMEM_NOCOMPACT = &H10 Private Const GMEM_NODISCARD = &H20 Private Const GMEM_ZEROINIT = &H40 Private Const GMEM_MODIFY = &H80 Private Const GMEM_DISCARDABLE = &H100 Private Const GMEM_NOT_BANKED = &H1000 Private Const GMEM_SHARE = &H2000 Private Const GMEM_DDESHARE = &H2000 Private Const GMEM_NOTIFY = &H4000 Private Const GMEM_LOWER = GMEM_NOT_BANKED Private Const GMEM_VALID_FLAGS = &H7F72 Private Const GMEM_INVALID_HANDLE = &H8000 Private Const GHND = (GMEM_MOVEABLE Or GMEM_ZEROINIT) Private Const GPTR = (GMEM_FIXED Or GMEM_ZEROINIT)
Public Function ClipboardSetFiles(sfiles() As String, ByVal lcount As Long) As Boolean '//send files to clipboard Dim sTmp As String Dim dfs As DROPFILES Dim hGlobal As Long Dim lpGlobal As Long Dim i As Long '//Open clipboard If OpenClipboard(0) Then EmptyClipboard 'empty clipboard '//combine files For i = 0 To lcount - 1 sTmp = sTmp & sfiles(i) & vbNullChar Next sTmp = sTmp & vbNullChar hGlobal = GlobalAlloc(GHND, Len(dfs) + Len(sTmp)) 'Allocate If hGlobal Then '//make DROPFILES lpGlobal = GlobalLock(hGlobal) dfs.pFiles = Len(dfs) CopyMemory ByVal lpGlobal, dfs, Len(dfs) CopyMemory ByVal lpGlobal + Len(dfs), ByVal sTmp, Len(sTmp) GlobalUnlock hGlobal ClipboardSetFiles = SetClipboardData(CF_HDROP, hGlobal) 'copy sTmp to clipboard End If CloseClipboard 'close End If End Function
Public Function ClipboardGetFiles(sfiles() As String, lcount As Long, _ Optional ByRef DropEffect As FileDropEffectConstants) As Boolean '//get files from clipboard
'//If Clipboard.GetFormat(vbCFFiles) Then........ Dim hDrop As Long Dim sTmp As String Dim i As Long Const MAX_PATH As Long = 260 '//open clipboard If IsClipboardFormatAvailable(CF_HDROP) Then If OpenClipboard(0) Then 'Get Filelist data hDrop = GetClipboardData(CF_HDROP) lcount = DragQueryFile(hDrop, -1, vbNullString, 0) 'file entries lcount = lcount ReDim sfiles(lcount - 1) sTmp = String(MAX_PATH, Chr(0)) 'get file For i = 0 To lcount - 1 DragQueryFile hDrop, i, sTmp, MAX_PATH sfiles(i) = NullTrim(sTmp) Next i Dim lngFormat As Long Dim lngEffect As Long lngFormat = RegisterClipboardFormat(CFSTR_PREFERREDDROPEFFECT) hDrop = GetClipboardData(lngFormat) If (hDrop) Then CopyMemory lngEffect, ByVal hDrop, 4 DropEffect = lngEffect End If 'close Call CloseClipboard ClipboardGetFiles = True 'return End If End If End Function
Private Function NullTrim(ByRef inString As String) As String Dim iPos As Integer iPos = InStr(inString, Chr$(0)) If iPos > 0 Then NullTrim = Left$(inString, iPos - 1) Else NullTrim = inString End If End Function
'//本文由 Virtualalloc 原创,转载请注明出处。 
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