本文实例代码可以实现让VB的TextBox文本框垂直居中显示效果。此处需要注意：Form_Load()窗体代码中的多行属性设置必须为真，即Text1.MultiLine = True，该属性为只读属性，请在设计时修改，换行会被之后的代码屏蔽，不想屏蔽可自行修改，调用此函数就好了。
具体的功能代码如下：
'================================================================================ '| 模 块 名 | TextBoxMiddle '| 说 明 | 文本框居中显示 '================================================================================= Option Explicit Private Type RECT Left As Long Top As Long Right As Long Bottom As Long End Type Private Declare Function SendMessage Lib "user32 " Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Private Declare Function SetWindowText Lib "user32" Alias "SetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String) As Long Private 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 Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Private Const EM_GETRECT = &HB2 Private Const EM_SETRECTNP = &HB4 Private Const GWL_WNDPROC = (-4) Private Const WM_CHAR = &H102 Private Const WM_PASTE As Long = &H302 Private prevWndProc As Long Public ClipText As String Public Sub DisableAbility(TargetTextBox As TextBox) prevWndProc = GetWindowLong(TargetTextBox.hwnd, GWL_WNDPROC) SetWindowLong TargetTextBox.hwnd, GWL_WNDPROC, AddressOf WndProc End Sub Private 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 Select End Function Sub 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 mText End Sub '/////////////////////////////////////////////////////// '以下为窗体代码 '/////////////////////////////////////////////////////// Private Sub Form_Load() '================注意！！！================= '多行属性必须为真，暨Text1.MultiLine = True '该属性为只读属性，请在设计时修改 '换行会被之后的代码屏蔽，不想屏蔽可自行修改 '=========================================== '调用此函数就好了 VerMiddleText Me, Text1 Caption = Len(Text1) End Sub
【VB的TextBox文本框实现垂直居中显示的方法】相关文章：
★ VB6实现连接Access数据库的ADODB代码实现方法