We are planning to convert the 32bit application to support 64 bit OS. Currently the application uses MSXML 3.0 in Javascripts. I want to know whether it will work as it is in a 64 bit os or will there be any issues.
Based on a look at the COM registration on 64bit Win7 it appears that there is a 64bit MSXML3.
However use of older versions of MSXML is deprecated, better to upgrade to the latest—V6—a significant application change is a good opportunity for this.