如何在wxWidgets中设置最小窗口大小？

class MyFrame : public wxFrame
{
public:
    MyFrame() : wxFrame(NULL, wxID_ANY, "My Frame")
    {
        SetMinSize(wxSize(300, 200));
    }
};

class MyFrame : public wxFrame
{
public:
    MyFrame() : wxFrame(NULL, wxID_ANY, "My Frame")
    {
        SetSizeHints(wxSize(300, 200), wxDefaultSize);
    }
};

class MyFrame : public wxFrame
{
public:
    MyFrame() : wxFrame(NULL, wxID_ANY, "My Frame")
    {
        SetInitialSize(wxSize(300, 200));
    }
};