VBS 16进制验证特定字符

'验证字符：fastslz 
file=Wscript.ScriptFullName 
Dim slz 
set slz = CreateObject("Adodb.Stream") 
slz.Type = 1 
slz.Mode = 3 
slz.Open 
slz.Position = 0 
slz.Loadfromfile file 
Bin=slz.read(18) 
if AscB(MidB(Bin,12,1))=&H66 and AscB(MidB(Bin,13,1))=&H61 and AscB(MidB(Bin,14,1))=&H73 and AscB(MidB(Bin,15,1))=&H74 and AscB(MidB(Bin,16,1))=&H73 and AscB(MidB(Bin,17,1))=&H6C and AscB(MidB(Bin,18,1))=&H7A Then 
WScript.echo "通过验证" 
else 
WScript.echo "非法修改" 
end if