From Forum Nokia Wiki

// Creates a scrollbar frame
iItemList->CreateScrollBarFrameL(ETrue);
//set scroll bar visibility
iItemList->ScrollBarFrame()->
     SetScrollBarVisibilityL(CEikScrollBarFrame::EOn, CEikScrollBarFrame::EOn);
//Force any scroll bars and the corner window if it is visible to be redrawn
iItemList->ScrollBarFrame()->DrawScrollBarsNow();

The first parameter controls the horizontal (<->), the second the vertical(like an I) scrollbar. Setting one of the parameters to EOff disables the scrollbar, setting it to EAuto displays it if needed.

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