I have:

// class myclass : public CCoeControl

iListBox = new (ELeave) CAknSingleGraphicStyleListBox;
iListBox->ConstructL(this,EAknListBoxMultiselectionList);
iListBox->SetContainerWindowL(*this);

//Append Items

iListBox->CreateScrollBarFrameL(ETrue);
iListBox->ScrollBarFrame()->SetScrollBarVisibilityL(CEikScrollBarFrame::EOn,CEikScrollBarFrame::EAuto);
iListBox->SetRect(Rect());
iListBox->ActivateL();

But ScrollBar is invisible. Whats wrong?
Thanks.