找出目前執行檔的所有的表單

public class FormsCollection : CollectionBase
{
    public Form Add(Form FormObject)
    {
        base.List.Add(FormObject);
        return (FormObject);
    }

    public void Remove(Form FormObject)
    {
        base.List.Remove(FormObject);
    }
}

走訪的方式

Type form = typeof(Form);
foreach (Type item in Assembly.GetExecutingAssembly().GetTypes())
{
    //if (item.BaseType == typeof(Form))
    if (item.Name.StartsWith("Frm_"))
    {
        Form f = (Form)Activator.CreateInstance(item);
        forms.Add(f);
    }
}

資料來源：微軟知識庫