How to correctly show a wxMessageBox with the value of "string01"? [C++, wxFormBuilder, wxWidgets] : How to correctly show a MessageBox with the value of "string01"? [C++, wxFormBuilder, wxWidgets]

gui.h:

    ///////////////////////////////////////////////////////////////////////////
    // C++ code generated with wxFormBuilder (version Oct 26 2018)
    // http://www.wxformbuilder.org/
    //
    // PLEASE DO *NOT* EDIT THIS FILE!
    ///////////////////////////////////////////////////////////////////////////
    
    #pragma once
    
    #include <wx/artprov.h>
    #include <wx/xrc/xmlres.h>
    #include <wx/intl.h>
    #include <wx/string.h>
    #include <wx/stattext.h>
    #include <wx/gdicmn.h>
    #include <wx/font.h>
    #include <wx/colour.h>
    #include <wx/settings.h>
    #include <wx/textctrl.h>
    #include <wx/sizer.h>
    #include <wx/statline.h>
    #include <wx/bitmap.h>
    #include <wx/image.h>
    #include <wx/icon.h>
    #include <wx/button.h>
    #include <wx/dialog.h>
    #include <wx/msgdlg.h> 
    
    ///////////////////////////////////////////////////////////////////////////
    
    
    ///////////////////////////////////////////////////////////////////////////////
    /// Class MainDialogBase
    ///////////////////////////////////////////////////////////////////////////////
    class MainDialogBase : public wxDialog
    {
    	private:
    
    	protected:
    		wxStaticText* m_staticText3;
    		wxStaticText* m_staticText1;
    		wxTextCtrl* m_textCtrl1;
    		wxStaticText* m_staticText4;
    		wxTextCtrl* m_textCtrl2;
    		wxStaticLine* m_staticLine;
    		wxButton* m_button1;
    		wxButton* m_button2;
    
    		// Virtual event handlers, overide them in your derived class
    		virtual void OnCloseDialog( wxCloseEvent& event ) { event.Skip(); }
    		virtual void m_button1OnButtonClick( wxCommandEvent& event ) { event.Skip(); }
    		virtual void m_button2OnButtonClick( wxCommandEvent& event ) { event.Skip(); }
    
    
    	public:
    
    		MainDialogBase( wxWindow* parent, wxWindowID id = wxID_ANY, const wxString& title = wxEmptyString, const wxPoint& pos = wxDefaultPosition, const wxSize& size =     wxSize( 191,252 ), long style = wxCLOSE_BOX|wxDEFAULT_DIALOG_STYLE );
    		~MainDialogBase();
    
    };

gui.cpp:

    ///////////////////////////////////////////////////////////////////////////
    // C++ code generated with wxFormBuilder (version Oct 26 2018)
    // http://www.wxformbuilder.org/
    //
    // PLEASE DO *NOT* EDIT THIS FILE!
    ///////////////////////////////////////////////////////////////////////////
    
    #include "gui.h"
    
    ///////////////////////////////////////////////////////////////////////////
    
    MainDialogBase::MainDialogBase( wxWindow* parent, wxWindowID id, const wxString& title, const wxPoint& pos, const wxSize& size, long style ) : wxDialog( parent, id, title, pos, size, style )
    {
    	this->SetSizeHints( wxSize( -1,-1 ), wxDefaultSize );
    
    	wxBoxSizer* mainSizer;
    	mainSizer = new wxBoxSizer( wxVERTICAL );
    
    	wxBoxSizer* bSizer8;
    	bSizer8 = new wxBoxSizer( wxHORIZONTAL );
    
    	wxBoxSizer* bSizer2;
    	bSizer2 = new wxBoxSizer( wxVERTICAL );
    
    	m_staticText3 = new wxStaticText( this, wxID_ANY, _("Patient's data"), wxDefaultPosition, wxSize( 105,-1 ), 0 );
    	m_staticText3->Wrap( -1 );
    	m_staticText3->SetFont( wxFont( 10, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_BOLD, false, wxT("Sans") ) );
    
    	bSizer2->Add( m_staticText3, 0, wxALL, 5 );
    
    	wxBoxSizer* bSizer3;
    	bSizer3 = new wxBoxSizer( wxHORIZONTAL );
    
    	m_staticText1 = new wxStaticText( this, wxID_ANY, _("First Name:"), wxDefaultPosition, wxDefaultSize, 0 );
    	m_staticText1->Wrap( -1 );
    	bSizer3->Add( m_staticText1, 0, wxALL, 5 );
    
    	m_textCtrl1 = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, 0 );
    	bSizer3->Add( m_textCtrl1, 0, wxALL, 5 );
    
    
    	bSizer2->Add( bSizer3, 1, wxEXPAND, 5 );
    
    	wxBoxSizer* bSizer4;
    	bSizer4 = new wxBoxSizer( wxHORIZONTAL );
    
    	m_staticText4 = new wxStaticText( this, wxID_ANY, _("Last Name:"), wxDefaultPosition, wxDefaultSize, 0 );
    	m_staticText4->Wrap( -1 );
    	bSizer4->Add( m_staticText4, 0, wxALL, 5 );
    
    	m_textCtrl2 = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, 0 );
    	bSizer4->Add( m_textCtrl2, 0, wxALL, 5 );
    
    
    	bSizer2->Add( bSizer4, 1, wxEXPAND, 5 );
    
    
    	bSizer8->Add( bSizer2, 1, 0, 5 );
    
    
    	mainSizer->Add( bSizer8, 1, wxEXPAND, 5 );
    
    	m_staticLine = new wxStaticLine( this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxLI_HORIZONTAL );
    	mainSizer->Add( m_staticLine, 0, wxEXPAND | wxALL, 5 );
    
    	m_button1 = new wxButton( this, wxID_ANY, _("Record Data"), wxDefaultPosition, wxDefaultSize, 0 );
    	mainSizer->Add( m_button1, 0, wxALL|wxEXPAND, 5 );
    
    	m_button2 = new wxButton( this, wxID_ANY, _("List"), wxDefaultPosition, wxDefaultSize, 0 );
    	mainSizer->Add( m_button2, 0, wxALL|wxEXPAND, 5 );
    
    	wxBoxSizer* bSizer9;
    	bSizer9 = new wxBoxSizer( wxHORIZONTAL );
    
    
    	mainSizer->Add( bSizer9, 1, wxEXPAND, 5 );
    
    
    	this->SetSizer( mainSizer );
    	this->Layout();
    
    	this->Centre( wxBOTH );
    
    	// Connect Events
    	this->Connect( wxEVT_CLOSE_WINDOW, wxCloseEventHandler( MainDialogBase::OnCloseDialog ) );
    	m_button1->Connect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainDialogBase::m_button1OnButtonClick ), NULL, this );
    	m_button2->Connect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainDialogBase::m_button2OnButtonClick ), NULL, this );
    }
    
    MainDialogBase::~MainDialogBase()
    {
    	// Disconnect Events
    	this->Disconnect( wxEVT_CLOSE_WINDOW, wxCloseEventHandler( MainDialogBase::OnCloseDialog ) );
    	m_button1->Disconnect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainDialogBase::m_button1OnButtonClick ), NULL, this );
    	m_button2->Disconnect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainDialogBase::m_button2OnButtonClick ), NULL, this );
    
    }

inheritedgui.h:

    #ifndef __inheritedgui__
    #define __inheritedgui__
    
    /**
    @file
    Subclass of MainDialogBase, which is generated by wxFormBuilder.
    */
    
    #include "gui.h"
    
    //// end generated include
    
    /** Implementing MainDialogBase */
    class inheritedgui : public MainDialogBase
    {
    	protected:
    		// Handlers for MainDialogBase events.
    		void OnCloseDialog( wxCloseEvent& event );
            void m_button1OnButtonClick(wxCommandEvent& event) override;
            void m_button2OnButtonClick(wxCommandEvent& event) override;
    	public:
    		/** Constructor */
    		inheritedgui( wxWindow* parent );
    	//// end generated class members
    
    };
    
    #endif // __inheritedgui__

inheritedgui.cpp:

    #include "inheritedgui.h"
    
    inheritedgui::inheritedgui( wxWindow* parent )
    :
    MainDialogBase( parent )
    {   
    
    }
    
    void inheritedgui::m_button1OnButtonClick(wxCommandEvent& event)
    {
     
    std::string string01 = m_textCtrl1->GetValue().ToStdString();
    
    }
    
    void inheritedgui::m_button2OnButtonClick(wxCommandEvent& event)
    {
    
    wxMessageBox( wxT(string01), wxT("This is the title"), wxICON_INFORMATION);
    
    }
    
    void inheritedgui::OnCloseDialog( wxCloseEvent& event )
    {
    // TODO: Implement OnCloseDialog
    }

I'm trying to show the value of "string01" in a wxMessageBox (as seen in "inheritedgui.cpp"), however when I click "m_button2", nothing happens and I don't know why :/

https://i.postimg.cc/jd6WDc6z/Screenshot-20200227-040106.png

What changes do I need to do so the wxMessageBox shows up when I click "m_button2" (is the one which says "List")?


Thanks!

