解析:
在VB6.0中， *** 作word，使用它强大的查找、替换、删除、复制、翦切功能。还可以把特定字符替换成图片。有了它你就可以使用数据库中的内容或图片文件替换word文件中的特定字符。
只要把下列内容复制到写字板中，另存为SetWord.cls文件，然后在把它添加到工程中，就可以使用了。
VERSION 1.0 CLASS
BEGIN
MultiUse = -1 'True
Persistable = 0 'NotPersistable
DataBindingBehavior = 0 'vbNone
DataSourceBehavior = 0 'vbNone
MTSTransactionMode = 0 'NotAnMTSObject
END
Attribute VB_Name = "SetWord"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Private mywdapp As Word.Application
Private mysel As Object
'属性值的模块变量
Private C_TemplateDoc As String
Private C_newDoc As String
Private C_PicFile As String
Private C_ErrMsg As Integer
Public Event HaveError()
Attribute HaveError.VB_Description = "出错时激发此事件.出错代码为ErrMsg属性"
'***************************************************************
'ErrMsg代码：1－word没有安装 2 - 缺少参数 3 - 没权限写文件
' 4 - 文件不存在
'
'***************************************************************
Public Function ReplacePic(FindStr As String, Optional Time As Integer = 0) As Integer
Attribute ReplacePic.VB_Description = "查找FindStr,并替换为PicFile所指向的图片文件,替换次数由time参数确定,为0时，替换所有"
'********************************************************************************
' 从Word.Range对象mysel中查找所有FindStr，并替换为PicFile图像
' 替换次数由time参数确定，为0时，替换所有
'********************************************************************************
If Len(C_PicFile) = 0 Then
C_ErrMsg = 2
Exit Function
End If
Dim i As Integer
Dim findtxt As Boolean
mysel.Find.ClearFormatting
mysel.Find.Replacement.ClearFormatting
With mysel.Find
.Text = FindStr
.Replacement.Text = ""
.Forward = True
.Wrap = wdFindContinue
.Format = False
.MatchCase = False
.MatchWholeWord = False
.MatchByte = True
.MatchWildcards = False
.MatchSoundsLike = False
.MatchAllWordForms = False
End With
mysel.HomeKey Unit:=wdStory
findtxt = mysel.Find.Execute(Replace:=True)
If Not findtxt Then
ReplacePic = 0
Exit Function
End If
i = 1
Do While findtxt
mysel.InlineShapes.AddPicture FileName:=C_PicFile
If i = Time Then Exit Do
i = i + 1
mysel.HomeKey Unit:=wdStory
findtxt = mysel.Find.Execute(Replace:=True)
Loop
ReplacePic = i
End Function
Public Function FindThis(FindStr As String) As Boolean
Attribute FindThis.VB_Description = "查找FindStr,如果模板中有FindStr则返回True"
If Len(FindStr) = 0 Then
C_ErrMsg = 2
Exit Function
End If
mysel.Find.ClearFormatting
mysel.Find.Replacement.ClearFormatting
With mysel.Find
.Text = FindStr
.Replacement.Text = ""
.Forward = True
.Wrap = wdFindContinue
.Format = False
.MatchCase = False
.MatchWholeWord = False
.MatchByte = True
.MatchWildcards = False
.MatchSoundsLike = False
.MatchAllWordForms = False
End With
mysel.HomeKey Unit:=wdStory
FindThis = mysel.Find.Execute
End Function
Public Function ReplaceChar(FindStr As String, RepStr As String, Optional Time As Integer = 0) As Integer
Attribute ReplaceChar.VB_Description = "查找FindStr,并替换为RepStr,替换次数由time参数确定,为0时，替换所有"
'********************************************************************************
' 从Word.Range对象mysel中查找FindStr，并替换为RepStr
' 替换次数由time参数确定，为0时，替换所有
'********************************************************************************
Dim findtxt As Boolean
If Len(FindStr) = 0 Then
C_ErrMsg = 2
RaiseEvent HaveError
Exit Function
End If
mysel.Find.ClearFormatting
mysel.Find.Replacement.ClearFormatting
With mysel.Find
.Text = FindStr
.Replacement.Text = RepStr
.Forward = True
.Wrap = wdFindContinue
.Format = False
.MatchCase = False
.MatchWholeWord = False
.MatchByte = True
.MatchWildcards = False
.MatchSoundsLike = False
.MatchAllWordForms = False
End With
If Time >0 Then
For i = 1 To Time
mysel.HomeKey Unit:=wdStory
findtxt = mysel.Find.Execute(Replace:=wdReplaceOne)
If Not findtxt Then Exit For
Next
If i = 1 And Not findtxt Then
ReplaceChar = 0
Else
ReplaceChar = i
End If
Else
mysel.Find.Execute Replace:=wdReplaceAll
End If
End Function
Public Function GetPic(PicData() As Byte, FileName As String) As Boolean
Attribute GetPic.VB_Description = "把图像数据PicData,存为PicFile指定的文件"
'********************************************************************************
' 把图像数据PicData,存为PicFile指定的文件
'********************************************************************************
On Error Resume Next
If Len(FileName) = 0 Then
C_ErrMsg = 2
RaiseEvent HaveError
Exit Function
End If
Open FileName For Binary As #1
If Err.Number <>0 Then
C_ErrMsg = 3
Exit Function
End If
'二进制文件用Get,Put存放，读取数据
Put #1, , PicData
Close #1
C_PicFile = FileName
GetPic = True
End Function
Public Sub DeleteToEnd()
Attribute DeleteToEnd.VB_Description = "删除从当前位置到结尾的所有内容"
mysel.EndKey Unit:=wdStory, Extend:=wdExtend
mysel.Delete Unit:=wdCharacter, Count:=1
End Sub
Public Sub MoveEnd()
Attribute MoveEnd.VB_Description = "光标移动到文档结尾"
'光标移动到文档结尾
mysel.EndKey Unit:=wdStory
End Sub
Public Sub GotoLine(LineTime As Integer)
mysel.GoTo What:=wdGoToLine, Which:=wdGoToFirst, Count:=LineTime, Name:=""
End Sub
Public Sub OpenDoc(view As Boolean)
Attribute OpenDoc.VB_Description = "打开Word文件,View确定是否显示Word界面"
On Error Resume Next
'********************************************************************************
' 打开Word文件，并给全局变量mysel赋值
'********************************************************************************
If Len(C_TemplateDoc) = 0 Then
mywdapp.Documents.Add
Else
mywdapp.Documents.Open (C_TemplateDoc)
End If
If Err.Number <>0 Then
C_ErrMsg = 4
RaiseEvent HaveError
Exit Sub
End If
mywdapp.Visible = view
mywdapp.Activate
Set mysel = mywdapp.Application.Selection
'mysel.Select
End Sub
Public Sub OpenWord()
On Error Resume Next
'********************************************************************************
' 打开Word程序，并给全局变量mywdapp赋值
'********************************************************************************
Set mywdapp = CreateObject("word.application")
If Err.Number <>0 Then
C_ErrMsg = 1
RaiseEvent HaveError
Exit Sub
End If
End Sub
Public Sub ViewDoc()
Attribute ViewDoc.VB_Description = "显示Word程序界面"
mywdapp.Visible = True
End Sub
Public Sub AddNewPage()
Attribute AddNewPage.VB_Description = "插入分页符"
mysel.InsertBreak Type:=wdPageBreak
End Sub
Public Sub WordCut()
Attribute WordCut.VB_Description = "剪切模板所有内容到剪切板"
'保存模板页面内容
mysel.WholeStory
mysel.Cut
mysel.HomeKey Unit:=wdStory
End Sub
Public Sub WordCopy()
Attribute WordCopy.VB_Description = "拷贝模板所有内容到剪切板"
mysel.WholeStory
mysel.Copy
mysel.HomeKey Unit:=wdStory
End Sub
Public Sub WordDel()
mysel.WholeStory
mysel.Delete
mysel.HomeKey Unit:=wdStory
End Sub
Public Sub WordPaste()
Attribute WordPaste.VB_Description = "拷贝剪切板内容到当前位置"
'插入模块内容
mysel.Paste
End Sub
Public Sub CloseDoc()
Attribute CloseDoc.VB_Description = "关闭Word文件模板"
'********************************************************************************
' 关闭Word文件模本
'********************************************************************************
On Error Resume Next
mywdapp.ActiveDocument.Close False
If Err.Number <>0 Then
C_ErrMsg = 3
Exit Sub
End If
End Sub
Public Sub QuitWord()
'********************************************************************************
' 关闭Word程序
'********************************************************************************
On Error Resume Next
mywdapp.Quit
If Err.Number <>0 Then
C_ErrMsg = 3
Exit Sub
End If
End Sub
Public Sub SavetoDoc()
Attribute SavetoDoc.VB_Description = "保存当前文档为FileName指定文件"
On Error Resume Next
'并另存为文件FileName
If Len(C_newDoc) = 0 Then
C_ErrMsg = 2
RaiseEvent HaveError
Exit Sub
End If
mywdapp.ActiveDocument.SaveAs (C_newDoc)
If Err.Number <>0 Then
C_ErrMsg = 3
RaiseEvent HaveError
Exit Sub
End If
End Sub
Public Property Get TemplateDoc() As String
Attribute TemplateDoc.VB_Description = "模板文件名."
TemplateDoc = C_TemplateDoc
End Property
Public Property Let TemplateDoc(ByVal vNewValue As String)
C_TemplateDoc = vNewValue
End Property
Public Property Get newdoc() As String
Attribute newdoc.VB_Description = "执行CloseDoc方法时，将模板文件另存为此文件名指定的新文件.如果不指定，在执行CloseDoc方法时，将产生一个错误"
newdoc = C_newDoc
End Property
Public Property Let newdoc(ByVal vNewValue As String)
C_newDoc = vNewValue
End Property
Public Property Get PicFile() As String
Attribute PicFile.VB_Description = "图像文件名"
PicFile = C_PicFile
End Property
Public Property Let PicFile(ByVal vNewValue As String)
C_PicFile = vNewValue
End Property
Public Property Get ErrMsg() As Integer
Attribute ErrMsg.VB_Description = "错误信息.ErrMsg代码: 1-word没有安装 2-缺少参数 3-没权限写文件 4-文件不存在"
ErrMsg = C_ErrMsg
End Property
VB6.0可通过使用Mid函数、InStr 函数和&运算符等来实现一个已知的字符串中插入一个字符。
Mid 函数， 返回 Variant (String)，其中包含字符串中指定数量的字符。
InStr 函数，返回 Variant (Long)，指定一字符串在另一字符串中最先出现的位置。
&运算符，用来强制两个表达式作字符串连接。
以下代码在字符串“VB中怎样在一个已知的字符串中插入一个字符？"的第一个中字后插入一个逗号“，”。
Option ExplicitDim strSj As String
Dim strSj1 As String
Dim s As String
Dim i As Long
Private Sub Command1_Click()
i = InStr(Text1, "中")
Text2 = Mid(Text1, 1, i) & s & Mid(Text1, 4)
End Sub
Private Sub Form_Load()
Text1 = "VB中怎样在一个已知的字符串中插入一个字符？"
s = "，"
End Sub
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