fileName object me -- return fileName string of the open file
status object me -- return the error code of the last method called
error object me, int error -- return the error string of the error
setFilterMask object me, string mask -- set the filter mask for dialogs
openFile object me, string fileName, int mode -- opens named file. valid modes: 0=r/w 1=r 2=w
closeFile object me -- close the file
displayOpen object me -- displays an open dialog and returns the selected fileName to lingo
displaySave object me, string title, string defaultFileName -- displays save dialog and returns selected fileName to lingo
createFile object me, string fileName -- creates a new file called fileName
setPosition object me, int position -- set the file position
getPosition object me -- get the file position
getLength object me -- get the length of the open file
writeChar object me, string theChar -- write a single character (by ASCII code) to the file
writeString object me, string theString -- write a null-terminated string to the file
readChar object me -- read the next character of the file and return it as an ASCII code value
readLine object me -- read the next line of the file (including the next RETURN) and return as a string
readFile object me -- read from current position to EOF and return as a string
readWord object me -- read the next word of the file and return it as a string
readToken object me, string skip, string break -- read the next token and return it as a string
getFinderInfo object me -- get the finder info for the open file (Mac Only)
setFinderInfo object me, string attributes -- set the finder info for the open file (Mac Only)
delete object me -- deletes the open file
+ version xtraRef -- display fileIO version and build information in the message window
* getOSDirectory -- returns the full path to the Mac System Folder or Windows Directory
"

你这样会有个问题呀。
如果用户自己安装过呢？ 这样不会有你的divx.txt文件的。那么你的判断有什么用呢？
看看通过其他的方法检测！
比如用ActivexX 来做。　我没有做过，但是觉得应该可以的。

divx是什么插件？

他的安装在注册表中注册键直吗？
如果是！就利用bud api来检测相关的键直！以此了解这个茶碱的安装！

你可以利用相关软件（具体不详）监视这个茶碱的安装过程，看他在注册中的改动！