How to implement mouse drag using wxWidgets

I have an application without borders so I cannot move the application. This application has a wxPanel so the only way I can click and drag is thru the wxPanel. How to implement mouse drag?

class myFrame : public wxFrame

{

public:

myFrame(const wxString& title, wxWindow *parent=NULL);

wxWindow* parent;

private:

wxDECLARE_EVENT_TABLE();

}

class myPanel : public wxPanel

{

public:

myPanel (wxWindow* parent)

    {

this->parent = parent;

dragging=false;

x=0,y=0;

              Create(parent, wxID_ANY,wxDefaultPosition, *new wxSize(100,100));

    }

void onMouseDown(wxMouseEvent& evt)

{

CaptureMouse();

x = evt.GetX();

y = evt.GetY();

dragging=true;

}

void onMouseUp(wxMouseEvent& evt)

{

ReleaseMouse();

dragging=false;

}

void onMove(wxMouseEvent& evt)

{

if(dragging)

{

wxPoint mouseOnScreen = wxGetMousePosition();

int newx = mouseOnScreen.x - x;

int newy = mouseOnScreen.y - y;

parent->Move(newx, newy);

}

}

private:

wxWindow* parent;

bool dragging;

        int x,y;

wxDECLARE_EVENT_TABLE();

};

wxBEGIN_EVENT_TABLE(myPanel , wxPanel)

EVT_LEFT_DOWN(myPanel ::onMouseDown)

EVT_LEFT_UP(myPanel ::onMouseUp)

EVT_MOTION(myPanel ::onMove)

wxEND_EVENT_TABLE()

wxBEGIN_EVENT_TABLE(myFrame , wxFrame)

wxEND_EVENT_TABLE()

myFrame ::myFrame (const wxString& title, wxWindow *parent)

: wxFrame(NULL, wxID_ANY, title,wxDefaultPosition,wxDefaultSize, wxFULLSCREEN_NOCAPTION)

{

this->parent = parent;

wxPanel* p = new myPanel (this);

}