Category Archives: .NET

DominantColor: Calculating the dominant color in an image


Taskbaricon mouseover highlight

First things first: Happy new year! I am sure 2016 will be a great year! Next up: DominantColor. It’s a project for calculating the dominant (hue) color in an image.This is something that took some research as I was building JeS Multi-Monitor Suite. The taskbar in Windows 7, 8 and 8.1 implemented a similar feature showing the dominant color as a highlight when you mouseover the taskbar icon. Continue reading

Yara.NET – A .NET wrapper around Yara

Today I publish Yara.NET – A C++/CLI .NET wrapper around the Yara 3.4.0 library. It enables you to use all the Yara functionality that the native C lib exposes in .NET! Yara.NET API was inspired by the Python API and has thus a somewhat similar API. Why is it built in C++/CLI and not C#? Because building a wrapper library in C# around a native library is a pain compared to using C++/CLI. Using C++/CLI you can link directly against the native lib and use all of the existing header files without the need to redefine every function using PInvoke..

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.NET, PInvoke and memory corruption

Screenshot 2013-10-26 11.23.38

Figure 1, .NET Pinvoke memory corruption

Today I ran into some old screenshots of a problem I was having in 2013. Interesting problem! I was trying retrieve a piece of data that was located in another process memory space using the ReadProcessMemory API. I defined the API using PInvoke(Platform Invoke), a technique used to call native functions from .NET. The issue I was having was that only under Windows 8 I was getting a NullReferenceException and initially I had no clue why. Continue reading