由给定的字符串生成关键字
'函数名：CreateKeyWord
'作 用：由给定的字符串生成关键字
'参 数：Constr---要生成关键字的原字符串
'返回值：生成的关键字
'**************************************************
Function CreateKeyWord(byval Constr,Num)
If Constr="" or IsNull(Constr)=True or Constr="$False$" Then
CreateKeyWord="$False$"
Exit Function
End If
If Num="" or IsNumeric(Num)=False Then
Num=2
End If
Constr=Replace(Constr,CHR(32),"")
Constr=Replace(Constr,CHR(9),"")
Constr=Replace(Constr," ","")
Constr=Replace(Constr," ","")
Constr=Replace(Constr,"(","")
Constr=Replace(Constr,")","")
Constr=Replace(Constr,"<","")
Constr=Replace(Constr,">","")
Constr=Replace(Constr,"""","")
Constr=Replace(Constr,"?","")
Constr=Replace(Constr,"*","")
Constr=Replace(Constr,"|","")
Constr=Replace(Constr,",","")
Constr=Replace(Constr,".","")
Constr=Replace(Constr,"/","")
Constr=Replace(Constr,"\","")
Constr=Replace(Constr,"-","")
Constr=Replace(Constr,"@","")
Constr=Replace(Constr,"#","")
Constr=Replace(Constr,"$","")
Constr=Replace(Constr,"%","")
Constr=Replace(Constr,"&","")
Constr=Replace(Constr,"+","")
Constr=Replace(Constr,":","")
Constr=Replace(Constr,"：","")
Constr=Replace(Constr,"‘","")
Constr=Replace(Constr,"“","")
Constr=Replace(Constr,"”","")
Dim i,ConstrTemp
For i=1 To Len(Constr)
ConstrTemp=ConstrTemp & "|" & Mid(Constr,i,Num)
Next
If Len(ConstrTemp)<254 Then
ConstrTemp=ConstrTemp & "|"
Else
ConstrTemp=Left(ConstrTemp,254) & "|"
End If
CreateKeyWord=ConstrTemp
End Function