可以直接用API改变textbox的扩展样式

VERSION 5.00
Begin VB.Form Form1
Caption = "Form1"
ClientHeight = 6135
ClientLeft = 165
ClientTop = 735
ClientWidth = 7080
LinkTopic = "Form1"
ScaleHeight = 6135
ScaleWidth = 7080
StartUpPosition = 3 ''Windows Default
Begin VB.CommandButton Command2
Caption = "Command2"
Height = 375
Left = 4800
TabIndex = 4
Top = 5040
Width = 1455
End
Begin VB.PictureBox Pic1
BorderStyle = 0 ''None
Height = 495
Left = 960
ScaleHeight = 495
ScaleWidth = 2655
TabIndex = 5
Top = 2880
Width = 2655
End
Begin VB.Timer Timer1
Interval = 10
Left = 240
Top = 3120
End
Begin VB.CheckBox Check1
Caption = "选择，再看按钮的文字，然后不要选择"
Height = 855
Left = 960
TabIndex = 1
Top = 3600
Width = 4575
End
Begin VB.CommandButton Command1
Caption = "歪歪的VB技巧演示"
Height = 1695
Left = 360
TabIndex = 0
Top = 960
Width = 5295
End
Begin VB.TextBox Text1
Height = 495
Left = 1080
MultiLine = -1 ''True
TabIndex = 3
Top = 5040
Width = 2415
End
Begin VB.Label Label1
Caption = "Label1"
Height = 375
Left = 600
TabIndex = 2
Top = 240
Width = 1215
End
Begin VB.Menu mnuChange
Caption = "改变样式(&C)"
Begin VB.Menu mnuFlash
Caption = "FlashWindow(&F)"
End
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
''这是我机子中的一个例子,包含了你说的那个功能,我想就没必要再改了,凑合着看看应该可以吧:)
Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
''Alignment constants
Private Const BS_CENTER& = &H300&
Private Const BS_LEFT& = &H100&
Private Const BS_RIGHT& = &H200&
Private Const BS_TOP& = &H400&
Private Const GWL_STYLE& = (-16)
Private Const GWL_EXSTYLE = (-20)
Private Const WS_EX_TRANSPARENT = &H20&
Private Const WS_THICKFRAME = &H40000
Private Const WS_BORDER = &H400000
Private Const WS_EX_CLIENTEDGE = &H200&
Dim FlashYn As Boolean, Yn As Boolean

''API Calls
Private Declare Function GetWindowLong& Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long)
Private Declare Function SetWindowLong& Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long)
Private Declare Function FlashWindow Lib "user32" (ByVal hwnd As Long, ByVal bInvert As Long) As Long
Const SWP_DRAWFRAME = &H20
Const SWP_NOMOVE = &H2
Const SWP_NOSIZE = &H1
Const SWP_NOZORDER = &H4
Const SWP_FRAMECHANGED = &H20 '' The frame changed: send WM_NCCALCSIZE

Private Sub Check1_Click()
''Declare Variables
Dim tmpValue&, ret&
Dim Align&
''Check if the state is checked
If Check1.Value = Checked Then ''Yes

fAlignment& = BS_LEFT
tmpValue& = GetWindowLong&(Command1.hwnd, GWL_STYLE) And Not BS_RIGHT
ret& = SetWindowLong&(Command1.hwnd, GWL_STYLE, tmpValue& Or fAlignment&)
Command1.Refresh
Else ''No
fAlignment& = BS_CENTER
tmpValue& = GetWindowLong&(Command1.hwnd, GWL_STYLE) And Not BS_RIGHT Or BS_LEFT
ret& = SetWindowLong&(Command1.hwnd, GWL_STYLE, tmpValue& Or fAlignment&)
Command1.Refresh
End If
End Sub

Private Sub Command2_Click()
''Declare Variables
Dim tmpValue&, ret&
Dim Align&
''Check if the state is checked
tmpValue& = (GetWindowLong&(Text1.hwnd, GWL_EXSTYLE)) ''Or WS_EX_CLIENTEDGE) ''And Not WS_BORDER
ret& = SetWindowLong&(Text1.hwnd, GWL_EXSTYLE, tmpValue&)

tmpValue& = (GetWindowLong&(Text1.hwnd, GWL_STYLE) Or WS_THICKFRAME) ''And Not WS_BORDER
ret& = SetWindowLong&(Text1.hwnd, GWL_STYLE, tmpValue&)
SetWindowPos Text1.hwnd, Me.hwnd, 0, 0, 0, 0, SWP_NOSIZE Or SWP_NOMOVE Or SWP_NOZORDER Or SWP_DRAWFRAME
Text1.Refresh
End Sub

'' -> VB WorkShop 2000
Private Sub Form_Load()
Dim tmpValue&, ret&
FlashYn = False: Yn = False
''tmpValue& = GetWindowLong&(Me.hwnd, GWL_EXSTYLE)
''ret& = SetWindowLong&(Me.hwnd, GWL_EXSTYLE, tmpValue& Or WS_EX_TRANSPARENT)
tmpValue& = GetWindowLong&(Check1.hwnd, GWL_EXSTYLE)
ret& = SetWindowLong&(Check1.hwnd, GWL_EXSTYLE, tmpValue& Or WS_EX_TRANSPARENT)
Command1.Refresh
Check1.Refresh
Me.Refresh

End Sub

Private Sub mnuFlash_Click()
FlashYn = True
End Sub

Private Sub Text11_Change()

End Sub

Private Sub Timer1_Timer()
If (FlashYn = True) Then FlashWindow Me.hwnd, Not Yn
End Sub