Custom dialog derived from wxDialog does not have close button and cannot be moved on windows

Question

In my wxWidget app, I have a custom dialog derived from wxDialog. The custom dialog basically works. When I run the app on MacOS, the custom dialog has a close button and can be moved around on the screen with the mouse. But on Windows 10 (with wxWidgets 3.2.2.1), the custom dialog does not have a close button and cannot be moved around with the mouse. I have google'd and tried other samples, but have not found a fix. How can I fix this problem?

This is my header file

class DlgDisplayLogs : public wxDialog
{
    public:
    DlgDisplayLogs(wxWindow* parent, const wxString& title);
    int insertPage(wxString caption, wxString hostname, wxArrayString strArray);
    void OnClose(wxCloseEvent& event);
    void onCopyClipboardClicked(wxCommandEvent& event);

    private:
    wxWindow*   parent;
    wxNotebook* notebook;
    DlgDisplayLogs* aham;
};

This is the .cpp file

DlgDisplayLogs::DlgDisplayLogs(wxWindow* parent, const wxString & title)
       : wxDialog(parent, -1, title, wxDefaultPosition, wxSize(800, 600),
       wxRESIZE_BORDER | wxCLOSE_BOX | wxMINIMIZE_BOX | wxMAXIMIZE_BOX)
{
    this->parent = parent;

    Bind(wxEVT_CLOSE_WINDOW, &DlgDisplayLogs::OnClose, this);

    notebook = new wxNotebook();
    notebook->Create(this, wxID_ANY, wxDefaultPosition, wxDefaultSize);
}

And this is how I create and launch the custom dialog

dlgDisplayLogs = new DlgDisplayLogs(this, "System log");
dlgDisplayLogs->Show(); 

Answer 1

You need to use wxCAPTION style to show the title bar under MSW.

Arguably, wxMSW shouldn't require it if any of wxXXX_BOX styles are specified, and I've created a PR to change this, but in the meanwhile just adding wxCAPTION is a simple enough workaround.