program to show and hide a toolbar

Question

following is the code which shows and hide a toolbar...the problem is that it does not displays the toolbar..and the showcontrolbar()does not work either.plz help... Is there any other way round??? I am using visual studio 5.0...

#include<afxwin.h>
#include<afxext.h>
#include<stdafx.h>
#include"resource.h"

class myframe: public CFrameWnd
{
private:
    CToolBar t1;
    int visible;
public:
    myframe() {
        Create ( 0, TEXT ( "Toolbar" ) );
    }

    int OnCreate ( LPCREATESTRUCT l ) {
        t1.Create ( this, WS_CHILD | WS_VISIBLE | CBRS_TOP | CBRS_BORDER_LEFT | CBRS_BORDER_RIGHT | CBRS_BORDER_TOP | CBRS_BORDER_BOTTOM );
        t1.LoadToolBar ( IDR_TOOLBAR1 );
        visible = 1;
        return 0;
    }

    void drawline() {
        MessageBox ( TEXT ( "Line" ), TEXT ( "drawline" ) );
    }

    void drawrectangle() {
        MessageBox ( TEXT ( "Rectangle" ), TEXT ( "drawrectangle" ) );
    }

    void drawcircle() {
        MessageBox ( TEXT ( "Circle" ), TEXT ( "drawlcircle" ) );
    }

    void drawtriangle() {
        MessageBox ( TEXT ( "Triangle" ), TEXT ( "drawtriangle" ) );
    }

    void showtoolbar() {
        if ( visible == 1 )
            MessageBox ( TEXT ( "Toolbar is already visible" ) );
        else {
            ShowControlBar ( &t1, TRUE, FALSE );
            visible = 1;
        }
    }

    void hidetoolbar() {
        if ( visible == 0 )
            MessageBox ( TEXT ( "Toolbar is already hidden" ) );
        else {
            ShowControlBar ( &t1, FALSE, FALSE );
            visible = 0;
        }
    }



    DECLARE_MESSAGE_MAP()
};
BEGIN_MESSAGE_MAP ( myframe, CFrameWnd )
    ON_WM_CREATE()
    ON_COMMAND ( 101, drawline )
    ON_COMMAND ( 102, drawrectangle )
    ON_COMMAND ( 103, drawcircle )
    ON_COMMAND ( 104, drawtriangle )
    ON_COMMAND ( 1001, showtoolbar )
    ON_COMMAND ( 1002, hidetoolbar )

END_MESSAGE_MAP()

class myapp: public CWinApp
{
public:
    int InitInstance() {
        myframe *p;
        p = new myframe;
        p->ShowWindow ( 3 );
        m_pMainWnd = p;

        return 1;
    }
};
myapp a;