MQL5 ReferenceStandard LibraryFilesCFileSize HandleFilenameFlagsSetUnicodeSetCommonOpenCloseDeleteIsExistCopyMoveSizeTellSeekFlushIsEndingIsLineEndingFolderCreateFolderDeleteFolderCleanFileFindFirstFileFindNextFileFindClose Size Gets file size in bytes. ulong Size() Return Value file size in bytes. If there is no file assigned, it returns ULONG_MAX. Move Tell