主题：[求助]RichTextBox窗口段落首行缩进如何设置

前期的帖子：RichTextBox随机单元格例子

http://www.foxtable.com/bbs/dispbbs.asp?boardid=2&Id=98484

希望RichTextBox窗口显示数据时段落首行缩进，数据表保持不缩进。

谢谢！

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1、全局代码：

Public Class UtilsSetLineSpace
Public Const WM_USER As Integer = &H400
Public Const EM_GETPARAFORMAT As Integer = WM_USER + 61
Public Const EM_SETPARAFORMAT As Integer = WM_USER + 71
Public Const MAX_TAB_STOPS As Long = 32
Public Const PFM_LINESPACING As UInteger = &H100
<StructLayout(LayoutKind.Sequential)> _
Private Structure PARAFORMAT2
Public cbSize As Integer
Public dwMask As UInteger
Public wNumbering As Short
Public wReserved As Short
Public dxStartIndent As Integer
Public dxRightIndent As Integer
Public dxOffset As Integer
Public wAlignment As Short
Public cTabCount As Short
<MarshalAs(UnmanagedType.ByValArray, SizeConst := 32)> _
Public rgxTabs As Integer()
Public dySpaceBefore As Integer
Public dySpaceAfter As Integer
Public dyLineSpacing As Integer
Public sStyle As Short
Public bLineSpacingRule As Byte
Public bOutlineLevel As Byte
Public wShadingWeight As Short
Public wShadingStyle As Short
Public wNumberingStart As Short
Public wNumberingStyle As Short
Public wNumberingTab As Short
Public wBorderSpace As Short
Public wBorderWidth As Short
Public wBorders As Short
End Structure

Public Sub mytxt_TextChanged(sender As Object, e As EventArgs)
Functions.Execute("mytxt_TextChanged", sender, e)
End Sub

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2、窗口afterload：

Dim rt As new Windows.Forms.RichTextBox  '定义 一个RichTextBox
rt.Dock = Windows.Forms.DockStyle.Fill  '控件停靠方式为撑满父控件
rt.name = "mytxt"  '设置控件名称
e.Form.Controls("Panel1").BaseControl.Controls.Add(rt)   '控件放入Panel1中作为子控件
vars("xy") = ""

UtilsSetLineSpace.SetLineSpace(rt, 400)
addhandler rt.TextChanged, addressof mytxt_TextChanged

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3、窗口TimerTick：

If vars("xy") <> CurrentTable.RowSel & "," & CurrentTable.ColSel Then
    vars("xy") = CurrentTable.RowSel & "," & CurrentTable.ColSel   
    Dim rt = e.form.Controls("Panel1").basecontrol.Controls("mytxt")
    rt.text = CurrentTable.Value
    rt.Select(0, rt.text.length)
    rt.SelectionColor = Color.Red    '背景色
    rt.SelectionFont = New Font("楷体",20,FontStyle.Bold)  '字体字号
End If

按照版主的提示，可以达到缩进的效果，但是感到变换单元格时，显示速度比较慢，好像等一下的感觉，定时器设置为100。請版主看看代码是否有问题，谢谢！

1、在RichTextBox窗口的TimerTick事件设置的添加空格代码：

Dim rt = e.form.Controls("Panel1").basecontrol.Controls("mytxt")

static ps As String = Nothing
Dim s As String = CurrentTable.RowSel & "," & CurrentTable.ColSel
If ps <> s Then
    Dim str As String = CurrentTable.Value
    str = str.Replace(chr(10), "").replace("    ", "")
    str = "    " & str.Replace(chr(13), vbcrlf & "    ").trim()
    CurrentTable.Value = str
    rt.text = CurrentTable.Current(CurrentTable.ColSel)
End If
ps = s

2、然后在当前表的AfterSelChange事件设置下列代码：