有没有一种惯用的.net方法来实现“培训卡帮助”?

你得自己处理这些信息。但是,为您创建一个这样做的类非常容易。例如。:

public class HelpCards : IMessageFilter {
    const int WM_TCARD = 0x52;
    const int ID_NOTIFICATION = 4242;

    public enum TCardAction: int {
        IDOK = 1,
        IDCANCEL = 2,
        IDABORT = 3,
        IDRETRY = 4,
        IDIGNORE = 5,
        IDYES = 6,
        IDNO = 7,
        IDCLOSE = 8,
        IDHELP = 9,

        HELP_TCARD = 0x8000,
        HELP_TCARD_DATA = 0x0010,
        HELP_TCARD_OTHER_CALLER = 0x0011,
        HELP_TCARD_OTHER_NEXT = 0x0011,
    }

    public HelpCards() {
        Application.AddMessageFilter(this);
    }

    public delegate void OKReceived();
    public event OKReceived OnOKReceived; 

    public bool PreFilterMessage(ref Message m) {
        if (m.Msg == WM_TCARD && (int)m.WParam == ID_NOTIFICATION) {
            switch ((TCardAction)m.LParam) {
                case TCardAction.IDOK:
                    if (OnOKReceived != null) {
                        OnOKReceived();
                    }
                    break;
                    // etc.
            }

            return true; // true means message was handled
        }

        return false;
    }
}

然后,在你想订阅的地方(可能在你的表单中的某个地方)使用

hc = new HelpCards();
hc.OnOKReceived += new OKReceived(hc_OnOKReceived);

并拥有 hc

HelpCards hc;

在某个地方有处理功能:

void hc_OnOKReceived() {
    throw new NotImplementedException();
}

显然,剩下的你得自己做。但这应该让你开始。