Article: Q231721
Product(s): Microsoft Visual Basic for Windows
Version(s): WINDOWS:5.0,6.0
Operating System(s):
Keyword(s): kbAPI kbClipboard kbSDKWin32 kbVBp kbVBp500 kbVBp600 kbGrpDSVB kbDSupport
Last Modified: 11-JAN-2001
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The information in this article applies to:
- Microsoft Visual Basic Professional Edition for Windows, versions 5.0, 6.0
- Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0
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SUMMARY
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When Windows Explorer is used to cut or copy files, it places information about
the files in the clipboard. A Visual Basic application can read this information
from the clipboard and act upon it.
MORE INFORMATION
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Step by Step Example
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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.
Additional query words:
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Keywords : kbAPI kbClipboard kbSDKWin32 kbVBp kbVBp500 kbVBp600 kbGrpDSVB kbDSupport
Technology : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVBA500 kbVBA600 kbVB500 kbVB600
Version : WINDOWS:5.0,6.0
Issue type : kbhowto
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