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Forum: .NET Office Automation 06-28-2010, 05:21 AM
Replies: 10
Views: 16,586
Posted By Mike Rosenblum
Hi Tony, Yes, Excel is single threaded for...

Hi Tony,

Yes, Excel is single threaded for user operations and executing macros. (It can be multi-threaded only for formula calculations in Excel 2007 and above.)

I surprised to hear this......
Forum: .NET Office Automation 06-25-2010, 07:08 AM
Replies: 10
Views: 16,586
Posted By Mike Rosenblum
Hi Tony, That is a PERFECT description......

Hi Tony,

That is a PERFECT description... and it clarifies that what I thought was going wrong is exactly what is going wrong: you are raising the event in VB.NET from a thread that is not the...
Forum: .NET Office Automation 06-24-2010, 01:03 PM
Replies: 10
Views: 16,586
Posted By Mike Rosenblum
Hi Tony, There are two basic issues to...

Hi Tony,



There are two basic issues to keep in mind:

(1) Excel is single-threaded, so you can only have one action operating at a time: either the user, or your code. But not both. The only...
Forum: .NET Office Automation 06-23-2010, 07:09 AM
Replies: 10
Views: 16,586
Posted By Mike Rosenblum
Hi Tony, Ok, there are two separate issues...

Hi Tony,

Ok, there are two separate issues going on here.

(1) The first is making sure that Excel's user IO and your code do not trample over each other. The use of Application.OnTime prevents...
Forum: .NET Office Automation 06-22-2010, 12:31 PM
Replies: 10
Views: 16,586
Posted By Mike Rosenblum
Hi Tony, Welcome to the forum. :) ...

Hi Tony,

Welcome to the forum. :)



Excel is single threaded when performing macro and/or user actions, so only one or the other can be occurring at a given time. If the user is performing an...
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