GetOverlappedResult

GetOverlappedResult

VB聲明

Declare Function GetOverlappedResult Lib "kernel32" Alias "GetOverlappedResult" (ByVal hFile As Long, lpOverlapped As OVERLAPPED, lpNumberOfBytesTransferred As Long, ByVal bWait As Long) As Long

說(shuō)明

判斷一個(gè)重疊操作當(dāng)前的狀態(tài)

返回值

Long，非零表示成功，零表示失敗。會(huì)設(shè)置GetLastError。如bWait為FALSE，而且異步操作仍在執(zhí)行，則函數(shù)回返回零，而GetLastError會(huì)設(shè)置成ERROR_IO_INCOMPLETE

參數(shù)表

參數(shù)

類(lèi)型及說(shuō)明

hFile

Long，指定一個(gè)文件、管道或通信設(shè)備的句柄

lpOverlapped

OVERLAPPED，為欲檢查的I/O操作指定的一個(gè)結(jié)構(gòu)

lpNumberOfBytesTransferred

Long，用于容納傳輸字節(jié)數(shù)量的一個(gè)變量

bWait

Long，如果為T(mén)RUE，就一直等到異步操作結(jié)束才返回。FALSE表示立即返回

Top