HANDLE CreateIoCompletionPort(

IN HANDLE FileHandle,

IN HANDLE ExistingCompletionPort,

IN ULONG_PTR CompletionKey,

IN DWORD NumberOfConcurrentThreads

);

怎么没有人回答啊..~~~

API函数
Public Declare Function CreateIoCompletionPort Lib "kernel32" Alias "CreateIoCompletionPort" (ByVal FileHandle As Long, ByVal ExistingCompletionPort As Long, ByVal CompletionKey As Long, ByVal NumberOfConcurrentThreads As Long) As Long

谢谢　

可以说说为什么在这个函数中类型都要用ＬＯＮＧ呢？

vb 没有 c++ 那么多灵活的类型，所以 vb 只能一律将它们变回long。
c++ 中的 HANDLE, HINSTANCE, HWND 等句柄类型都是这样

哦...

HANDLE CreateNewCompletionPort(DWORD dwNumberOfThreads)
{
return CreateIoCompletionPort(INVALID_HANDLE_VALUE,NULL,NULL,dwNumberOfThreads);
};

这个怎么用呢?
bool AssicoateDeviceWithCompletionPort(HANDLE hCompPort,HANDLE hDevice,DWORD dwCompKey)
{
HANDLE h=CreateIoCompletionPort(hDevice,hCompPort,dwCompKey,0);
return h==hCompPort;
};

BOOL GetQueuedCompletionStatus(
IN HANDLE CompletionPort,
OUT LPDWORD lpNumberOfBytesTransferred,
OUT PULONG_PTR lpCompletionKey,
OUT LPOVERLAPPED *lpOverlapped,
IN DWORD dwMilliseconds
);