lread

lread

VB聲明

Declare Function lread Lib "kernel32" Alias "_lread" (ByVal hFile As Long, lpBuffer As Any, ByVal wBytes As Long) As Long

說明

將文件中的數(shù)據(jù)讀入內(nèi)存緩沖區(qū)

返回值

Long，返回實(shí)際讀入的字節(jié)數(shù)。HFILE_ERROR意味著函數(shù)執(zhí)行出錯(cuò)。如這個(gè)數(shù)字小于wBytes，則表明早已抵達(dá)了文件的末尾。會(huì)設(shè)置GetLastError

參數(shù)表

參數(shù)

類型及說明

hFile

Long，文件句柄

lpBuffer

Any，指定一個(gè)內(nèi)存塊的指針，數(shù)據(jù)將讀入這個(gè)內(nèi)存塊

wBytes

Long，要讀入的字節(jié)數(shù)

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