Rambling thoughts on GIS and Remote sensing tools, Data visualization, Geospatial application development, GIS programming/scripts and spatial technologies....
The article written by Dylan Currier, Low Level Global Keyboard Hook / Sink in C# .NET is one the simple, easily understandable, and and working post on Global Keyboard hook out there in internet. It worked in my WPF application and I added following line in the WPF app to refresh hook after each key press- IDK if it is write or wrong, more likely to be a wrong practice to hook/unhook every time but it gets the job done. The primary reason to refresh hook is to prevent app hanging (not responding to the key press) after few clicks on the WPF button.