Spotting Custom UI Errors in Visio Add-ins

I have written many COM and VSTO add-ins for Visio, but got confused when a client recently reported that the following Custom UI Runtime Error was appearing. I wasn’t getting the same error on any of my test laptops, so I chatted with my good friend, and fellow Visio MVP, John Goldsmith ( John Goldsmith’s visLog (typepad.co.uk) ). He gave me an excellent tip….

He remembered that he had seen somewhere a setting for displaying UI errors, and after first searching vainly in the Visio UI, we found it in Excel in the Excel Options. This Show add-in user interface errors setting is apparently Office wide, so ticking it meant that it as enabled for Visio desktop too.

And what was the error?

I had simply forgotten that the <Separator /> element in the Ribbon.xml file requires a unique id attribute …

Setting Default Measurement Units in Visio Pages

Microsoft Visio can handle many different units of measurements which can be set for a page and separately for shapes, such as dimensions, within the page. This can confuse some users who expect them both to be the same all the time. In fact, the dimension units can be set to be the same as…

Refreshing the cached installed files of Visio

I have created many Visio solutions over the past 25 years and used a number of methods of creating an installation that includes Visio templates and stencils. I have just wasted many hours trying to debug an installation created with Advanced Installer until I realised that the problem was that Visio was not properly updating…

Linking Data to Shapes in Visio after using Data Visualizer

Data Visualizer (DV) in Visio Plan 2 (Data | Create from Data | Create ) is great because it provides a way of automatically creating a diagram from data, but it also prevents some of the other data-linking features in Visio from being used. This is because DV wants to take control of the data…

Counting glued and connected shapes in Visio

I got a surprise in one of my projects when I counted the shapes glued together using the Shape.GluedShapes(…) method … the sum of the filtered glued shapes just didn’t add up to the unfiltered count. So, I thought I should check the Shape.ConnectedShapes(…) method too … and there is a scenario where that has…

My new book on Visualizing Processes with Microsoft Visio has launched

Back in the early 1990s, there was an application called ABC Flowcharter that was the market leader for diagramming business flowcharts, but some of the brains behind Aldus PageMaker saw an opportunity to create something smarter, and left to write the Visio product, with the stated aim to overtake ABC Flowcharter within 2 years. They…

Layer Set menu options and calls from code added to LayerManager

LayerManager for Microsoft Visio layer sets can now be called from external code and are also available from a sub-menu of the Layer Buttons drop-down ribbon button. The Layer Manager window does not need to be open to use the sub-menu because it detects the Layer Set buttons on the page. (more…)