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union
{
#define HEAP_SIGNATURE __int64(0xA55AA55AA55AA55A)
BOOL m_bHeap;
__int64 m_llsignature;
};
//这个地方会有一个warnning
//[bcc32 Warning] CustomSinks.h(84): W8056 Integer arithmetic overflow
if(m_llsignature == HEAP_SIGNATURE)
{
//...
}