Ok, so I'm still learning the ropes of C++ here so I apologize if this is a simple mistake.

I have this class:

class RunFrame : public wxFrame {
public:
    RunFrame();
    void OnKey(wxKeyEvent& keyEvent);

private:
    //  Configuration variables.
    const wxString *title;
    const wxPoint *origin;
    const wxSize *size;
    const wxColour *background;
    const wxColour *foreground;
    const wxString *placeholder;

    //  Control variables.
    wxTextCtrl *command;

    //  Event table.
    DECLARE_EVENT_TABLE()
};

...then in the OnKey method I have this code:

void RunFrame::OnKey(wxKeyEvent& keyEvent) {
    //  Take the key and process it.
    if(WXK_RETURN == keyEvent.GetKeyCode()) {
        bool empty = command -> IsEmpty();
    }

    //  Propogate the event through.
    keyEvent.Skip();
}

...but my program keeps seg faulting when it reaches the line where I attempt to call the IsEmpty method from the command variable. My question is, "Why?" In the constructor of the RunFrame class I can seemingly call methods for the command variable in the same way I'm doing so in the OnKey method...and it compiles correctly, it just seg faults on me when it attempts to execute that line.

Here is the code for the constructor if necessary:

RunFrame::RunFrame() :
wxFrame(NULL, wxID_ANY, wxT("DEFAULT"), wxDefaultPosition, wxDefaultSize, wxBORDER_NONE) {
    //  Create the styling constants.
    title = new wxString(wxT("RUN"));
    origin = new wxPoint(0, 0);
    size = new wxSize(250, 25);
    background = new wxColour(33, 33, 33);
    foreground = new wxColour(255, 255, 255);
    placeholder = new wxString(wxT("command"));

    //  Set the styling for the frame.
    this -> SetTitle(*title);
    this -> SetSize(*size);

    //  Create the panel and attach the TextControl to it.
    wxPanel *panel = new wxPanel(this, wxID_ANY, *origin, *size, wxBORDER_NONE);

    //  Create the text control and attach it to the panel.
    command = new wxTextCtrl(panel, wxID_ANY, *placeholder, *origin, *size);

    //  Set the styling for the text control.
    command -> SetBackgroundColour(*background);
    command -> SetForegroundColour(*foreground);

    //  Connect the key event to the text control.
    command -> Connect(wxEVT_CHAR, wxKeyEventHandler(RunFrame::OnKey));

    //  Set the focus to the command box.
    command -> SetFocus();
}

Thanks in advance for any help you can give!

Regards, celestialorb