ASP wsImage组件添加水印的实用代码(4)

objStream.Position=theStart-1
stemp=""
for i=1 to theLen
if objStream.EOS then Exit for
c=ascB(objStream.Read(1))
If c > 127 Then
if objStream.EOS then Exit for
stemp=stemp&Chr(AscW(ChrB(AscB(objStream.Read(1)))&ChrB(c)))
i=i+1
else
stemp=stemp&Chr(c)
End If
Next
subString=stemp
End function
Function inString(theStart,varStr)
dim i,j,bt,theLen,str
InString=0
Str=toByte(varStr)
theLen=LenB(Str)
for i=theStart to objStream.Size-theLen
if i>objstream.size then exit Function
objstream.Position=i-1
if AscB(objstream.Read(1))=AscB(midB(Str,1)) then
InString=i
for j=2 to theLen
if objstream.EOS then
inString=0
Exit for
end if
if AscB(objstream.Read(1))<>AscB(MidB(Str,j,1)) then
InString=0
Exit For
end if
next
if InString<>0 then Exit Function
end if
next
End Function
Private function GetFileName(FullPath)
If FullPath <> "" Then
GetFileName = mid(FullPath,InStrRev(FullPath, "\")+1)
Else
GetFileName = ""
End If
End function
function toByte(Str)
dim i,iCode,c,iLow,iHigh
toByte=""
For i=1 To Len(Str)
c=mid(Str,i,1)
iCode =Asc(c)
If iCode<0 Then iCode = iCode + 65535
If iCode>255 Then
iLow = Left(Hex(Asc(c)),2)
iHigh =Right(Hex(Asc(c)),2)
toByte = toByte & chrB("&H"&iLow) & chrB("&H"&iHigh)
Else
toByte = toByte & chrB(AscB(c))
End If
Next
End function
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