Help me please ! Problem with "DrawText" ! Thanks very much!

Hi all!
I try to draw in Draw function but it still doesn't appear. Help me plesase !Thanks very much

Thanks very much!
Text appears when I add your code in hellowold of SDK but in my example it doesn't . I don't know what error ?please help me! thanks very much!( in my example, I use multiview and CTimer )

This is my code ! Please help me to correct it!Thanks very much!
----------------------------------------------------------------- My code ---------------------------------------------------------------------------
#include "TrainAppUi.h"
#include "TopmenuContainer.h"
#include "TOPMENU.mbg"
#include "BitmapMethods.h"
#include "Train.hrh"

CTopmenuContainer* CTopmenuContainer::NewL(const TRect& aRect)
{
    CTopmenuContainer* self = CTopmenuContainer::NewLC(aRect);
    CleanupStack::Pop(self);
    return self;
}

CTopmenuContainer* CTopmenuContainer::NewLC(const TRect& aRect)
{
    CTopmenuContainer* self = new (ELeave) CTopmenuContainer;
    CleanupStack::PushL(self);
    self->ConstructL(aRect);
    return self;
}

void CTopmenuContainer::ConstructL(const TRect& aRect)
{
    CreateWindowL();
    SetRect(aRect);

    // Load background in the bitmap images from the multi bitmap file
    iTopmenu_BackgroundImage = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                                EMbmTopmenuBackground );

    //----- Load all trains in the multibitmap
    iTopmenu_LeftImage1 = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                     EMbmTopmenuLeft_image1 );
    iTopmenu_LeftImage2 = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                     EMbmTopmenuLeft_image2 );
    iTopmenu_LeftImage3 = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                     EMbmTopmenuLeft_image3 );
    iTopmenu_LeftImage4 = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                     EMbmTopmenuLeft_image4 );

    iTopmenu_RightImage1 = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                     EMbmTopmenuRight_image1 );
    iTopmenu_RightImage2 = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                     EMbmTopmenuRight_image2 );
    iTopmenu_RightImage3 = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                     EMbmTopmenuRight_image3 );
    iTopmenu_RightImage4 = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                     EMbmTopmenuRight_image4 );

    iTopmenu_LeftRightmask = iEikonEnv->CreateBitmapL( KTopmenuFilename,
                                      EMbmTopmenuLeftright_mask );


    // Create the off screen bitmap and device / gc
    iOffScreenBitmap       = NBitmapMethods::CreateBitmapL( Rect().Size(),KColourDepth );
    iOffScreenBitmapDevice = NBitmapMethods::CreateBitmapDeviceL( *iOffScreenBitmap );
    iOffScreenBitmapGc     = NBitmapMethods::CreateGraphicsContextL( *iOffScreenBitmapDevice );

    // Ham khoi tao thoi gian
    iPeriodicTimer = CPeriodic::NewL( CActive::EPriorityStandard );

    //----- Get value to Flag_Train
    iFlag_Train = 1;

    //----- Get value to Flag_Text
    iFlag_Text = 1;

    //SetUpSpritesL();
    ActivateL();
}

void CTopmenuContainer::ViewTopmenu()
{
   // Call function display image
   CWindowGc &gc = SystemGc();

   gc.Activate( *DrawableWindow() );

   // Blit the background image onto the off screen bitmap
   //     at the top left position
   //iOffScreenBitmapGc->BitBlt( TPoint( 0,0 ),iTopmenu_BackgroundImage );

   //----- Output Train on topmenu
   switch( iFlag_Train )
   {
      case 1 :
      {
         NBitmapMethods::BitBltMaskedEntireBitmap
                ( *iOffScreenBitmapGc,TPoint(0,0),
                          *iTopmenu_LeftImage1,*iTopmenu_LeftRightmask );

         NBitmapMethods::BitBltMaskedEntireBitmap
                ( *iOffScreenBitmapGc,TPoint(152,0),
                           *iTopmenu_RightImage1,*iTopmenu_LeftRightmask );
         iFlag_Train = 2;
      } break;

      case 2 :
      {
         NBitmapMethods::BitBltMaskedEntireBitmap
                  ( *iOffScreenBitmapGc,TPoint(0,0),
                         *iTopmenu_LeftImage2,*iTopmenu_LeftRightmask );

         NBitmapMethods::BitBltMaskedEntireBitmap
                   ( *iOffScreenBitmapGc,TPoint(152,0),
                           *iTopmenu_RightImage2,*iTopmenu_LeftRightmask );
        iFlag_Train = 3;
      } break;

      case 3 :
      {
         NBitmapMethods::BitBltMaskedEntireBitmap
                  ( *iOffScreenBitmapGc,TPoint(0,0),
                         *iTopmenu_LeftImage3,*iTopmenu_LeftRightmask );

         NBitmapMethods::BitBltMaskedEntireBitmap
                  ( *iOffScreenBitmapGc,TPoint(152,0),
                         *iTopmenu_RightImage3,*iTopmenu_LeftRightmask );


        iFlag_Train = 4;
      } break;

      case 4 :
     {
        NBitmapMethods::BitBltMaskedEntireBitmap
                 ( *iOffScreenBitmapGc,TPoint(0,0),
                        *iTopmenu_LeftImage4,*iTopmenu_LeftRightmask );

        NBitmapMethods::BitBltMaskedEntireBitmap
                ( *iOffScreenBitmapGc,TPoint(152,0),
                        *iTopmenu_RightImage4,*iTopmenu_LeftRightmask );
       iFlag_Train = 1;
     } break;
   }

   //----- Output Text on topmenu    --------------------------Doesn't appear
   switch( iFlag_Text )
   {
        case 1:
        {
           /* gc.UseFont(iCoeEnv->NormalFont());
            gc.SetPenColor(0xFFFFFF);
            gc.SetBrushStyle(CWindowGc::ESolidBrush);
            _LIT( iText,"Hello Huynh Quoc Thang" );
            gc.DrawText( iText,TPoint(50,90));*/

            // Get smallest possible arial font
           _LIT(KMyFontName,"Arial");
           CFont* myFont;
           TFontSpec myFontSpec(KMyFontName,1);
           CGraphicsDevice* screenDevice = iCoeEnv->ScreenDevice();
           screenDevice->GetNearestFontInTwips(myFont,myFontSpec);
           // Use new font
           gc.UseFont(myFont);
           // Draw some text
           _LIT(KMyText,"My text Huynh Quoc Thang");
           gc.DrawText(KMyText, TPoint(40, 40) );
           // Discard and release the font
           gc.DiscardFont();
           screenDevice->ReleaseFont(myFont);
        } break;
   }

   // Blit the offscreen image onto the screen at the top left position
   gc.BitBlt( Rect().iTl,iOffScreenBitmap );

   gc.Deactivate();
}


TInt CTopmenuContainer::Period(TAny* aPtr)
{
    ( static_cast<CTopmenuContainer*>( aPtr ) )->ViewTopmenu();
    //Returning a value of TRUE indicates the callback should be done again
    return TRUE;
}

void CTopmenuContainer::Display_Topmenu()
{
    // If the timer is not already running, start it
    if ( !iPeriodicTimer->IsActive() )
    {
        iPeriodicTimer->Start( 1,1000,
                TCallBack(CTopmenuContainer::Period, this ) );
    }
}

void CTopmenuContainer::Draw(const TRect& aRect) const
{
    //----- Display background into screen
    Display_Topmenu();
}

CTopmenuContainer::CTopmenuContainer()
{
}

CTopmenuContainer::~CTopmenuContainer()
{
    if ( iPeriodicTimer )
    {
        // Stop the periodic timer
        iPeriodicTimer->Cancel();
    }
    delete iPeriodicTimer;
    iPeriodicTimer = NULL;


    delete iOffScreenBitmapGc;
    iOffScreenBitmapGc = NULL;
    delete iOffScreenBitmapDevice;
    iOffScreenBitmapDevice = NULL;
    delete iOffScreenBitmap;
    iOffScreenBitmap = NULL;

    delete iTopmenu_BackgroundImage;
    iTopmenu_BackgroundImage = NULL;
    delete iTopmenu_LeftImage1;
    iTopmenu_LeftImage1 = NULL;
    delete iTopmenu_LeftImage2;
    iTopmenu_LeftImage2 = NULL;
    delete iTopmenu_LeftImage3;
    iTopmenu_LeftImage3 = NULL;
    delete iTopmenu_LeftImage4;
    iTopmenu_LeftImage4 = NULL;
    delete iTopmenu_LeftRightmask;
    iTopmenu_LeftRightmask = NULL;
    delete iTopmenu_RightImage1;
    iTopmenu_RightImage1 = NULL;
    delete iTopmenu_RightImage2;
    iTopmenu_RightImage2 = NULL;
    delete iTopmenu_RightImage3;
    iTopmenu_RightImage3 = NULL;
    delete iTopmenu_RightImage4;
    iTopmenu_RightImage4 = NULL;
}

TKeyResponse CTopmenuContainer::OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType)
{
    switch( aKeyEvent.iScanCode)
    {
        case 164:
        {
             ((CTrainAppUi*)(ControlEnv()->AppUi()))->ActivateLocalViewL(TUid::Uid(iWelcomescreenID));
        } break;
    }
}