Tag Archives: Excel

Strategies for getting the last row in Excel with VBA

Using VBA to get the last row in Excel can be a surprisingly complex task. This post will explore some of the different strategies you can use. The first thing to do is to decide what you mean by “The … Continue reading

Posted in Excel, Formatting, VBA | Tagged , | 7 Comments

Excel JavaScript API Part 5: The large numbers bug

There is currently (JavaScript Excel API set 1.4) a rather nasty bug when writing large integer numbers (anything larger than int32) back to a range. The JS can correctly read these large numbers – it just silently gets the wrong … Continue reading

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Excel JavaScript API Part 4: The shallow copy problem

I was trying to read the values from a Range and then write modified versions of the values to two different ranges. Should be straightforward: Well this does not work: both B4 and B6 have 0.91 added to them: wrong … Continue reading

Posted in arrays, Excel, JS-API | Tagged , | 1 Comment

Excel JavaScript API Part 3: Benchmark of Processing Arrays Performance – Loop vs Reduce vs COUNTIFS vs VBA

In a previous post I compared several different ways of processing data with VBA. The fastest way was to get the data into a variant array and loop on it. JavaScript has some powerful array methods so I wanted to … Continue reading

Posted in arrays, JS-API, VBA | Tagged , , | 4 Comments

Excel JavaScript API Part 2: Benchmark of Read/Write Range Performance

As an Excel Office Developer many of the Excel based applications I develop depend on reading data from Excel worksheet ranges, processing it and then writing the processed data back to a worksheet. In VBA the way to do this … Continue reading

Posted in arrays, Calculation, JS-API, VBA | Tagged , , | 1 Comment

Excel Range.Value(ValueType): What is this parameter?

Whilst visiting Microsoft Research in Cambridge I was chatting to fellow MVP Roger Govier. He mentioned that he was using this strange parameter to the Range.Value (ValueType) method, which I had been meaning to look at for a long time … Continue reading

Posted in Formatting, VBA | Tagged , | 5 Comments

Excel JavaScript API Part 1: Overview & Comparison

I have been spending time in the last few months experimenting with the new JavaScript Excel API. This is the first of a planned series of posts examining the JS-API from the point of view of an Excel Office developer. … Continue reading

Posted in .NET, JS-API, UDF, Uncategorized, VBA, XLL | Tagged , , , , | 7 Comments

Excel Memory Checking Tool: Using LAA to increase useable Excel memory

Most of us sooner or later get hit by one or more of the dreaded messages “Out of Memory” or “Excel cannot complete this task with available resources” or “Not enough System Resources/Memory to Display Completely” , regardless of how … Continue reading

Posted in Memory, VBA | Tagged , , , , | 9 Comments

2016 Microsoft MVP Summit, Part 1

I was privileged to attend the 2016 Microsoft MVP Summit in Redmond November 6-10 along with many other Excel MVPs. We had some great sessions with the Excel and the Office Extensibility Product teams, and I have to say that … Continue reading

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Writing Efficient VBA UDFs Part 15: Adding Intellisense to your UDFs

For several years people have been asking the Excel Dev team to add the capability to create Intellisense for UDFs to work the same way as native Excel functions. Well, now Govert van Drimmelen, author of the wonderful Excel DNA, … Continue reading

Posted in .NET, UDF, VBA, XLL | Tagged , , , , | 10 Comments