First, make sure the OpenHandCursor.cur file is marked as Resource (not EmbeddedResource) in the referenced assembly.

Code Block

// use resource in local assembly

// new Uri("pack://application:,,,/folder/filename.cur")

// use resource in referenced assembly

// new Uri("yourAssemblyName;component/folder/filename.cur"
// ,UriKind.Relative)

Stream cursorStream =

Application.GetResourceStream(new Uri    ("CursorLib;component/cursors/help.cur",
UriKind.Relative)).Stream;

this.Cursor = new Cursor(cursorStream);