Click2Run is not a trial version. It is a full fledged Office suite, just that it is a "virtualized" solution. I was impressed with the *potential* when I tested the C2R beta but I thought Microsoft did not leverage it fully. And, I haven't used it since.
You will probably see a Q drive, which is where the virtualized apps reside -- at least that was the case during the beta.
I don't know if those apps can be programmatically accessed. If in the 'dos like language' you use it is possible to specify the full path to the application, you might try that.
If you choose to install the retail version of 2010 such that it coexists with 2007, you will have to install the 32 bit version.
It coexists just fine with 2007. And, with 2003 for that matter. I always install Office editions in sequence starting with the oldest and working my way to the latest.
During the install process specify the option that says 'retain all previous versions of Office." The one exception is Outlook. Only one version of Outlook can be installed on a computer. So, if you want to stay with O2007 you must explicitly choose to *not* install O2010. [For various reasons, I was extremely unhappy with Outlook 2010 and went back to Outlook 2007.]
By default, opening an Excel file will cause the last installed version of the program to be used.
Derek, I certainly do appreciate your prompt reply and I think you have solved my problem though I am a little nervous about remedying the problem.
My version of 2010 was installed on a new laptop at the factory. Properties of xls, xlsx, and csv files are labeled "Microsoft Application Virtualization DDE Launcher" not Excel.exe. When I queried "Help" on Excel, it described my installation as "click-to-run"
The help file says, "If you are dissatisfied with Microsoft Office Click-to-Run editions of Microsoft Office Home and Student or Microsoft Office Home and Business or if your problem is one of the known issues for Office Click-to-Run, it might be better for you to use the full retail edition of Microsoft Office."
It appears that the trial version is no longer the full version as it was with Office 2007.
Here is my new question. I need Office 2007. I need to learn Office 2010 so I can assist my student with either version. I have a full working version of Office 2007 on my computer. Are there any issues with installing Office 2010? Should I perform a custom install and select a directory separate from my Office 2007 directory? This will probably be done automatically if they can live together. Which will be the default if I, say, open an Excel file on the Internet?
Excel 2007 resides in c:\Program Files (x86)\Microsoft Office\Office 12\
Thanks again for the help.