如何使用VBA在Sharepoint站点中打开文件?

I am trying to open a file with a file name which changes every week. This means that the date part on the file name is varying. Also, this file is the ONLY file inside the folder. But its file name is changing. I am using the code below but it was throwing the error, 'Run time 52: Bad file name & number'. I need your help.I am trying to open a file with a file name whi