Scroll Bar em Userform VBA
Scroll Bar em Userform VBA
Esse vídeo trago uma forma diferente de olhar para os userforms geralmente limitados ao tamanho da tela do usuário. Aqui mostro a melhor forma de utilizar-se do scroll da página para melhor experiência do usuário. Aula focada em design e UI/UX.
- Defina a propriedade Scrollbars do seu userform para “fmScrollBarsVertical” e defina o tamanho do seu Userform na propriedade ScrollHeight.
- Após crie um módulo e cole o código abaixo:
Option Explicit
' Based on code from Peter Thornton here:
' http://social.msdn.microsoft.com/Forums/en-US/7d584120-a929-4e7c-9ec2-9998ac639bea/mouse-scroll-in-userform-listbox-in-excel-2010?forum=isvvba
Private Type POINTAPI
x As Long
y As Long
End Type
Private Type MOUSEHOOKSTRUCT
pt As POINTAPI
hwnd As Long
wHitTestCode As Long
dwExtraInfo As Long
End Type
Private Declare PtrSafe Function FindWindow Lib "user32" _
Alias "FindWindowA" ( _
ByVal lpClassName As String, _
ByVal lpWindowName As String) As Long
Private Declare PtrSafe Function GetWindowLong Lib "user32.dll" _
Alias "GetWindowLongA" ( _
ByVal hwnd As Long, _
ByVal nIndex As Long) As Long
Private Declare PtrSafe Function SetWindowsHookEx Lib "user32" _
Alias "SetWindowsHookExA" ( _
ByVal idHook As Long, _
ByVal lpfn As LongPtr, _
ByVal hmod As Long, _
ByVal dwThreadId As Long) As Long
Private Declare PtrSafe Function CallNextHookEx Lib "user32" ( _
ByVal hHook As Long, _
ByVal nCode As Long, _
ByVal wParam As Long, _
lParam As Any) As Long
Private Declare PtrSafe Function UnhookWindowsHookEx Lib "user32" ( _
ByVal hHook As Long) As Long
Private Declare PtrSafe Function PostMessage Lib "user32.dll" _
Alias "PostMessageA" ( _
ByVal hwnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long
Private Declare PtrSafe Function WindowFromPoint Lib "user32" ( _
ByVal xPoint As Long, _
ByVal yPoint As Long) As Long
Private Declare PtrSafe Function GetCursorPos Lib "user32.dll" ( _
ByRef lpPoint As POINTAPI) As Long
Private Const WH_MOUSE_LL As Long = 14
Private Const WM_MOUSEWHEEL As Long = &H20A
Private Const HC_ACTION As Long = 0
Private Const GWL_HINSTANCE As Long = (-6)
Private Const WM_KEYDOWN As Long = &H100
Private Const WM_KEYUP As Long = &H101
Private Const VK_UP As Long = &H26
Private Const VK_DOWN As Long = &H28
Private Const WM_LBUTTONDOWN As Long = &H201
Private Const cSCROLLCHANGE As Long = 10
Private mLngMouseHook As Long
Private mFormHwnd As Long
Private mbHook As Boolean
Dim mForm As Object
Sub HookFormScroll(oForm As Object)
Dim lngAppInst As Long
Dim hwndUnderCursor As Long
Set mForm = oForm
hwndUnderCursor = FindWindow("ThunderDFrame", oForm.Caption)
Debug.Print "Form window: " & hwndUnderCursor
If mFormHwnd <> hwndUnderCursor Then
UnhookFormScroll
Debug.Print "Unhook old proc"
mFormHwnd = hwndUnderCursor
lngAppInst = GetWindowLong(mFormHwnd, GWL_HINSTANCE)
If Not mbHook Then
mLngMouseHook = SetWindowsHookEx( _
WH_MOUSE_LL, AddressOf MouseProc, lngAppInst, 0)
mbHook = mLngMouseHook <> 0
If mbHook Then Debug.Print "Form hooked"
End If
End If
End Sub
Sub UnhookFormScroll()
If mbHook Then
UnhookWindowsHookEx mLngMouseHook
mLngMouseHook = 0
mFormHwnd = 0
mbHook = False
End If
End Sub
Private Function MouseProc( _
ByVal nCode As Long, ByVal wParam As Long, _
ByRef lParam As MOUSEHOOKSTRUCT) As Long
On Error GoTo errH 'Resume Next
If (nCode = HC_ACTION) Then
Debug.Print "action"
Debug.Print "right window"
If wParam = WM_MOUSEWHEEL Then
Debug.Print "mouse scroll"
MouseProc = True
If lParam.hwnd > 0 Then
mForm.ScrollTop = Application.Max(0, mForm.ScrollTop - cSCROLLCHANGE)
Else
mForm.ScrollTop = Application.Min(mForm.ScrollHeight - mForm.InsideHeight, mForm.ScrollTop + cSCROLLCHANGE)
End If
Exit Function
End If
End If
MouseProc = CallNextHookEx( _
mLngMouseHook, nCode, wParam, ByVal lParam)
Exit Function
errH:
UnhookFormScroll
End Function
3. Agora em seu formulário insira o código abaixo:
Private Sub UserForm_Initialize()
HookFormScroll Me
End Sub
Private Sub UserForm_QueryClose(Cancel As Integer, CloseMode As Integer)
UnhookFormScroll
End Sub