CString str("Hello world"); LPCTSTR lpStr = str.ReleaseBuffer();
CString str; str.GetBuffer(128); // Do some operations on the character buffer str.ReleaseBuffer(-1);In this example, we call the GetBuffer function to allocate a 128-byte buffer to store the character string. We then perform some operations on the buffer and call ReleaseBuffer function with a parameter of -1 to release the buffer and update the CString object's length. The CString ReleaseBuffer function belongs to the MFC library, which is a package library for Visual C++ that provides a set of classes and functions for developing Windows-based applications.