Question

用CreateNamePipe创建管道以后，ConnectNamedPipe出错，这是为什么

Answer 1

If the operation is asynchronous, ConnectNamedPipe returns immediately. If the operation is still pending, the return value is zero and GetLastError returns ERROR_IO_PENDING.
如果你使用的是异步，ConnectNamedPipe会立即返回，如果没有客户链接，返回0值，用GetLastError返回ERROR_IO_PENDING.

(You can use the HasOverlappedIoCompleted macro to determine when the operation has finished.) If the function fails, the return value is zero and
GetLastError returns a value other than ERROR_IO_PENDING or ERROR_PIPE_CONNECTED.
你可以用HasOverlappedIoCompleted这个宏，区确定操作是否结束

Answer 2

If the operation is asynchronous, ConnectNamedPipe returns immediately. If the operation is still pending, the return value is zero and GetLastError returns ERROR_IO_PENDING.
如果使用的是异步，ConnectNamedPipe会立即返回，如果没有客户链接，返回0值，用GetLastError返回ERROR_IO_PENDING.

(You can use the HasOverlappedIoCompleted macro to determine when the operation has finished.) If the function fails, the return value is zero and
GetLastError returns a value other than ERROR_IO_PENDING or ERROR_PIPE_CONNECTED.
可以用HasOverlappedIoCompleted这个宏，去确定操作是否结束