将RichTextBox设置为自动换行

来源:百度文库 编辑:神马文学网 时间:2024/05/23 23:25:57
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,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