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Question on running Excel when multiple vers of Excel are installe

Hello,

Lets say I built my app on a machine that has Excel 2003 installed. So, the
interop assembly created was built off of 2003.

Now, I have a few questions on what would happen if I ran the following code
on a machine that had, lets say, both Excel 2000 and Excel 2003 installed.

using Microsoft.Offic e.Interop.Excel ;
....
ApplicationClas s app = new ApplicationClas s();
MessageBox.Show (app.Version);
app.Quit();
....

1. If the user has both Excel 2000 and Excel 2003 installed, which one will
be started? Will it always start the latest version?

2. If no Excel is installed at all, would app be null after the call to new
ApplicationClas s() or would that call not even be able to run?

Thanks.
Jan 30 '06 #1
0 1013

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