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--
"Programmers never die,they just get lost in processing"

Hi,

I detected an error in www.tenouk.com/Winsock/Winsock2example7.html.

with the gethostbyname() and gethostbyaddr() Program Example

it should add

#include ctype.h (put the less than and greater than sign as usual)

at the first of all, doesn't it?

otherwise the compiler will report isalpha function doesn't declared.


Regards.

Hello,

thank you for providing the winsock tutorials!
Verbose and easy to understand!

When experimenting with the overlapped model sample,
(http://www.winsocketdotnetworkprogramming.com/winsock2programming/winsock2advancediomethod5e.html)
an invalid parameter error occured with WSAWaitForMultipleEvents:
DWORD WINAPI ProcessIO(LPVOID lpParameter)
{
.....
if ((Index = WSAWaitForMultipleEvents(EventTotal, EventArray, FALSE,
WSA_INFINITE, FALSE)) == WSA_WAIT_FAILED)

The invalid parameter was EventTotal == 0, and not == 1 as expected.
To fix the bug you must set EventTotal = 1 *before* you create the
thread for ProcessIO:


if ((EventArray[0] = WSACreateEvent()) == WSA_INVALID_EVENT)

{

printf("WSACreateEvent() failed with error %d\n", WSAGetLastError());

return 1;

}

else

printf("WSACreateEvent() is OK!\n");

////////// ==> fix: set EventTotal = 1 here:
EventTotal = 1;


// Create a thread to service overlapped requests

if (CreateThread(NULL, 0, ProcessIO, NULL, 0, &ThreadId) == NULL)

{

printf("CreateThread() failed with error %d\n", GetLastError());

return 1;

}

else

printf("Nothing to say, CreateThread() is OK!\n");


////////// ==> too late here, ProcessIO() could run already:
// EventTotal = 1;

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