title BufferCommand enumeration description Describes the BufferCommand enum, which is used to work with memory files via CMemFile::GetBufferPtr() ms.date 07/23/2020 f1_keywords afx/buffercommand helpviewer_keywords buffercommand enumeration [MFC] BufferCommand enumeration Used by CMemFile::GetBufferPtr to determine what action to take on the file-backed memory buffer. Syntax public enum BufferCommand { bufferRead, bufferWrite, bufferCommit, bufferCheck }; Members Name Description bufferRead Read the file-backed memory buffer. bufferWrite Write to the file-backed memory buffer. bufferCommit Advances the current position in the file-backed memory buffer to the end of the committed buffer. bufferCheck Determine whether the file-backed memory buffer can grow in size. Requirements Header: afxwinforms.h (defined in assembly atlmfc\lib\mfcmifc80.dll)