// This adds selection to a group
private void AddSelectionToGroup(int groupindex)
{
General.Interface.SetCursor(Cursors.WaitCursor);
// Make undo
undoredo.CreateUndo("Assign to group " + groupindex);
// Make selection
map.AddSelectionToGroup(0x01 << groupindex);
General.Interface.DisplayStatus(StatusType.Action, "Assigned selection to group " + groupindex);
General.Interface.SetCursor(Cursors.Default);
}