DECLARE INTEGER SetClipboardViewer IN WIN32API INTEGER SetClipboardViewer(thisform.hWnd)but I don't know how to catch this event in form.
'Create a new project, add a module to it 'Add a command button to Form1 'In the form Private Sub Form_Load() 'KPD-Team 1999 'URL: http://www.allapi.net/ 'E-Mail: KPDTeam@Allapi.net 'Subclass this form HookForm Me 'Register this form as a Clipboardviewer SetClipboardViewer Me.hwnd End Sub Private Sub Form_Unload(Cancel As Integer) 'Unhook the form UnHookForm Me End Sub Private Sub Command1_Click() 'Change the clipboard Clipboard.Clear Clipboard.SetText "Hello !" End Sub 'In a module 'These routines are explained in our subclassing tutorial. 'http://www.allapi.net/vbtutor/subclass.php Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long Declare Function SetClipboardViewer Lib "user32" (ByVal hwnd As Long) As Long Public Const WM_DRAWCLIPBOARD = &H308 Public Const GWL_WNDPROC = (-4) Dim PrevProc As Long Public Sub HookForm(F As Form) PrevProc = SetWindowLong(F.hwnd, GWL_WNDPROC, AddressOf WindowProc) End Sub Public Sub UnHookForm(F As Form) SetWindowLong F.hwnd, GWL_WNDPROC, PrevProc End Sub Public Function WindowProc(ByVal hwnd As Long, ByVal uMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long WindowProc = CallWindowProc(PrevProc, hwnd, uMsg, wParam, lParam) If uMsg = WM_DRAWCLIPBOARD Then MsgBox "Clipboard changed ..." End If End Function