M.Shadid

Use gMKVExtractGUI instead ! https://sourceforge.net/projects/gmkvextractgui/

DataEntry can work as dataset https://stackoverflow.com/questions/21669378/how-to-populate-objectlistview-using-dataset

I'm not sure what exactly you are trying to do, but it seems you are not using ObjectListView tool at all ! Either you compile the ObjectListView and then add a ref to the created dll or add the complete project as secondary object and make the output point to the debug of the Test project and then you can use it