How To Obtain Files Copied from Windows Explorer (231721)

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Step by Step Example

1. Start a new Visual Basic Standard EXE project. Form1 is created by default.
2. Add a ListBox (List1) and a CommandButton (Command1) control to Form1.
3. Paste the following code into the General Declarations section of Form1:

   Option Explicit
   
   Private Const CF_HDROP = 15
   
   Private Type POINT
       x As Long
       y As Long
   End Type
   
   Private Type DROPFILES
       pFiles As Long
       pt As POINT
       fNC As Long
       fWide As Long
   End Type
   
   Private Declare Function GlobalSize 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 Function OpenClipboard Lib "user32" _
      (ByVal hwnd As Long) As Long
   Private Declare Function CloseClipboard Lib "user32" () As Long
   Private Declare Function GetClipboardData Lib "user32" _
      (ByVal wFormat As Long) As Long
   
   Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _
      (Destination As Any, Source As Any, ByVal Length As Long)
   
   Private Sub ShowFilesOnClipboard()
      Dim lHandle As Long
      Dim lpResults As Long
      Dim lRet As Long
      Dim df As DROPFILES
      Dim strDest As String
      Dim lBufferSize As Long
      Dim arBuffer() As Byte
      Dim vNames As Variant
      Dim i As Long
   
      If OpenClipboard(0) Then
         lHandle = GetClipboardData(CF_HDROP)
         ' If you don't find a CF_HDROP, you don't want to process anything
         If lHandle > 0 Then
            lpResults = GlobalLock(lHandle)
            
            lBufferSize = GlobalSize(lpResults)
            ReDim arBuffer(0 To lBufferSize)
            
            CopyMemory df, ByVal lpResults, Len(df)
            Call CopyMemory(arBuffer(0), ByVal lpResults + df.pFiles, _
                            (lBufferSize - Len(df)))
   
            If df.fWide = 1 Then
               ' it is wide chars--unicode
               strDest = arBuffer
            Else
               strDest = StrConv(arBuffer, vbUnicode)
            End If
            GlobalUnlock lHandle
            vNames = Split(strDest, vbNullChar)
            i = 0
            While Len(vNames(i)) > 0
               List1.AddItem vNames(i)
               i = i + 1
            Wend
         End If
      End If
      CloseClipboard
   End Sub
   
   Private Sub Command1_Click()
      Call ShowFilesOnClipboard
   End Sub
   					

4. Run the project and use Windows Explorer to select and copy several files.
5. Press Command1 and note that the list of files that you copied is displayed in List1.