如何将HBuf转化为TBuf?

 From：http://www.sf.org.cn/Article/symbiandev/200711/20730.html

LIT(KSomeText, "Symbian");

HBufC* heapBuffer=HBufC::NewLC(15);

*heapBuffer = KSomeText;

TBuf<15> buffer(*heapBuffer);

CleanupStack::PopAndDestroy( heapBuffer );