荆条的意思:将RichTextBox设置为自动换行

来源:百度文库 编辑:九乡新闻网 时间:2024/04/29 12:29:02
  答案来自问专家网站和CSDN的,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