I am attempting to port the free SincPac C3D source code ( http://www.quuxsoft.com/SincpacC3D_source.aspx ) from Civil3D 2011 to Civil3D 2014. I have replaced the reference to acmgd.dll in Visual Studio required for 2011 with accoremgd.dll required for 2014. The methods InvokeHelp(string,string) and ShowModalDialog(System.Windows.Forms.Form) were in acmgd.dll but are missing from accoremgd.dll. Is there another assembly I can reference that has these methods? I am programming in C#.