将RichTextBox设置为自动换行或非自动换行

　　近日研究文本控件和字符串，研究得头混脑胀，问题真是太多了。
　　这只是其中的一个问题，答案来自问专家网站和CSDN的TechnoFantasy(www.applevb.com) ，解决如下：

Public Const WM_USER = &H400
Public Const EM_SETTARGETDEVICE = (WM_USER + 72)

Public Declare Function GetDC Lib "user32" (ByVal hWnd As Long) As Long
Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
  (ByVal hWnd As Long, _
   ByVal wMsg As Long, _
   ByVal wParam As Long, _
   lParam As Any) As Long


Public Sub AutoSwitchLine(ByRef RichText As Long, ByVal bSwitch As Boolean)
    If bSwitch Then
        ''''设置 RichTextBox 自动换行
        Call SendMessage(RichText.hWnd, EM_SETTARGETDEVICE, _
        GetDC(RichText.hWnd), RichText.Width / 15)
        If RichText.RightMargin = 0 Then
            RichText.RightMargin = 1
        Else
            RichText.RightMargin = 0
        End If
    Else
        ''''设置 RichTextBox 不自动换行
        Call SendMessage(RichText.hWnd, EM_SETTARGETDEVICE, 0, 1)
    End If
End Sub

Copyright ＠ 2007-2012 敏韬网(敏而好学，文韬武略--MinTao.Net)（学习笔记） Inc All Rights Reserved.
闵涛 E_mail:admin@mintao.net(欢迎提供学习资源)

鄂公网安备 42011102001154号

站长：MinTao ICP备案号：鄂ICP备11006601号-18