form1.frm

这里有很多很实用的VB编程案例,方便大家学习VB.

VERSION 5.00
Object = "{3B7C8863-D78F-101B-B9B5-04021C009402}#1.2#0"; "RICHTX32.OCX"
Begin VB.Form Form1 
   Caption         =   "RichTextBox 控件中实现上、下标形式"
   ClientHeight    =   2145
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   2145
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin RichTextLib.RichTextBox RichTextBox1 
      Height          =   735
      Left            =   1200
      TabIndex        =   0
      Top             =   360
      Width           =   1575
      _ExtentX        =   2778
      _ExtentY        =   1296
      _Version        =   393217
      TextRTF         =   $"Form1.frx":0000
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Form_Load()
    RichTextBox1.Font.Name = "Times New Roman"
    RichTextBox1.Font.Size = 10
    RichTextBox1.Text = "H2SO4"
    '向下移动两个象素.
    OffsetRichText RichTextBox1, 1, 1, 2
    OffsetRichText RichTextBox1, 4, 1, -2
End Sub

Private Sub OffsetRichText(rText As RichTextBox, start As Integer, length As Integer, _
offset As Integer)

    'start作为上、下标字符的起始位置；length指上下标字符的长度。
    'offset指上标还是下标，大于0上标；小于0下标。
    rText.SelStart = start
    rText.SelLength = length
    rText.SelFontSize = rText.Font.Size - Abs(offset)
    rText.SelCharOffset = ScaleY(offset, vbPoints, vbTwips)
    rText.SelStart = 0
    rText.SelLength = 0
End Sub