DLL question

[Tom Wright]

Okay, this may sound silly but I've never had to create a DLL in c# until now. I've written a C# dialog app and I want to run some crystal reports from a dll. So can someone point me to a tutorial that shows how to create dll's and how to call them from my C# app? Oh and in my dll I will need to pop up a dialog showing the report in it. Is this doable? I've done it plenty times in MFC. Thanks Tom Wright tawright915@yahoo.com -- modified at 18:12 Monday 1st May, 2006

[Robin Panther]

If you need Win32 dll - you can't create it in c#. You have to make it in c++ or any other native language. About using Win32 dlls from c# - search for Platform Invoke (p/invoke). This can be useful, for example If you need .net dll - just set in project properties, on Application tab, "output type" property to "Class library". Using .net dlls on design-time is very easy - add reference to needed dll and use it through Namespace.Class.Function system. For example, if your dll contains function ShowReport() in class Report in namespace MyReportNamespace, you just have to call for MyReportNamespace.Report.ShowReport(). About showing dialog - I don't know what about CrystalReport, but I've used a lot of forms, called from dlls. ____________________________________________ Robin Panther http://www.robinland.com