The example code in this article can achieve the effect of vertically centering the VB TextBox text box. Note here: the multi-line attribute setting in the Form_Load() form code must be true, that is, Text1.MultiLine = True. This attribute is a read-only attribute. Please modify it at design time. Line breaks will be blocked by subsequent codes. Do not want to The shield can be modified by yourself, just call this function.
The specific function codes are as follows:
'================================================== ==============================='| Module name| TextBoxMiddle'| Description| The text box is displayed in the center'==== ================================================== ===========================Option ExplicitPrivate Type RECT Left As Long Top As Long Right As Long Bottom As LongEnd TypePrivate Declare Function SendMessage Lib "user32 " Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As LongPrivate Declare Function SetWindowText Lib "user32" Alias "SetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String) As LongPrivate 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 LongPrivate Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA " (ByVal hwnd As Long, ByVal nIndex As Long) As LongPrivate Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As LongPrivate Const EM_GETRECT = &HB2Private Const EM_SETRECTNP = &HB4Private Const GWL_WNDPROC = (-4)Private Const WM_CHAR = &H102Private Const WM_PASTE As Long = &H302Private prevWndProc As LongPublic ClipText As StringPublic Sub DisableAbility(TargetTextBox As TextBox) prevWndProc = GetWindowLong(TargetTextBox.hwnd, GWL_WNDPROC) SetWindowLong TargetTextBox.hwnd, GWL_WNDPROC, AddressOf WndProcEnd SubPrivate Function WndProc(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long Dim Temp As String Select Case Msg Case WM_CHAR If wParam <> 13 Then WndProc = CallWindowProc(prevWndProc , hwnd, Msg, wParam, lParam) Case WM_PASTE ClipText = Clipboard.GetText Temp = Replace(ClipText, Chr(10), "") Temp = Replace(Temp, Chr(13), "") Clipboard.Clear Clipboard.SetText Temp WndProc = CallWindowProc(prevWndProc, hwnd, Msg , wParam, lParam) Clipboard.Clear Clipboard.SetText ClipText Case Else WndProc = CallWindowProc(prevWndProc, hwnd, Msg, wParam, lParam) End SelectEnd FunctionSub VerMiddleText(mForm As form, mText As TextBox) If mText.MultiLine = False Then Exit Sub Dim rc As RECT, tmpTop As Long, tmpBot As Long SendMessage mText.hwnd, EM_GETRECT, 0, rc With mForm.Font .Name = mText.Font.Name .Size = mText.Font.Size .Bold = mText.Font.Bold End With tmpTop = ((rc.Bottom - rc.Top) - _ ( mText.Parent.TextHeight("H ") / Screen.TwipsPerPixelY)) / 2 + 2 tmpBot = ((rc.Bottom - rc.Top) + _ (mText.Parent.TextHeight("H ") / Screen.TwipsPerPixelY)) / 2 + 2 rc.Top = tmpTop rc.Bottom = tmpBot mText.Alignment = vbCenter SendMessage mText.hwnd, EM_SETRECTNP, 0&, rc mText.Refresh DisableAbility mTextEnd Sub'/////////////////////////////////////////////////// ///////'The following is the form Code'/////////////////////////////////////////////////// ///////Private Sub Form_Load() '================Attention! ! ! ================= 'The multi-line attribute must be true, and Text1.MultiLine = True 'This attribute is a read-only attribute, please modify it at design time' Code blocking, if you don’t want to block it, you can modify it yourself'============================================ == 'Just call this function VerMiddleText Me, Text1 Caption = Len(Text1)End Sub