// Init API
HpdApi api = HpdApi.GetInstance();

// Open project and variant and document
Project project = api.OpenProject(@"d:\Project.hxproj");
				
Variant variant = project.GetVariants()[0];
Drawing2D nailboard = variant.GetNailboards().FirstOrDefault(w => w.Name == "Nailboard_1");
nailboard.Open(false, false);

// Obtain the pin occurrence.
OccNbPin pin = nailboard.GetAllOccurrences().OfType<OccNbPin>().FirstOrDefault(o => o.Name == "X1:1");
if (pin == null)
{
	// Resolve this issue.
}

// Enable properties of note for editing.
pin.Defaults = false;
pin.PinNote = true;

// Set up font properties
pin.NoteFont.FamilyName = "Tahoma";
pin.NoteFont.Size = 20f;
pin.NoteFont.Bold = true;
pin.NoteFont.Italic = true;
pin.NoteFont.Underlined = true;

// Save changes and close documents.
nailboard.Save();

nailboard.Close();
project.Close();