Application and Comparison of Descriptors in Symbian C

Symbian C++ using the descriptor to store a string or a byte stream.Descriptors keep the size of their buffers to ensure a memory safe operation.TBuf,TBufC,TPtr,TPtrC and HBufC are five descriptors can be instantiated.This paper focuses on the types organization,similarities and differences.The Symbian C++ programmers can reference to this work..