windows API练习(1)返回错误码字符串的函数

#include <windows.h>#include <string>using std::wstring;wstring GetErrIDMsg( DWORD dwError ){ HLOCAL hlocal = NULL; wstring wstrRetMsg; DWORD dwRet = FormatMessageW( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, dwError, MAKELANGID( LANG_ENGLISH, SUBLANG_ENGLISH_US ), (LPWSTR)&hlocal, 0, NULL ); if ( NULL != hlocal ) { wstrRetMsg = (LPWSTR)hlocal; LocalFree( hlocal ); } return wstrRetMsg;}