This question was posted by csharpbird: How to get the Hatch dialog using .NET? It seems that there is no such class in the .NET API? It's true there is no public class - or even a published function - to show the hatch dialog inside AutoCAD. It is, however, possible to P/Invoke an unpublished (and therefore unsupported and liable to change without warning) function exported from acad.exe. Here's some C# code that shows how. The code works for AutoCAD 2007, but will be different for AutoCAD 2006: the function takes and outputs strings, so the change to Unicode in…