How to get FastCGI NamedPipe handle in C

Hi

I try to connect my application in C with IIS via NamedPipe but I cannot get a pipe handle. CreateFile function always return ERROR_PIPE_BUSY value. What is correct way to get this handle? This is my source code:

#include <Windows.h>
#include <stdio.h>
#pragma warning(disable : 4996)

static void Log(const char * log, int logLen)
{
	FILE *	file;

	file = fopen("C:\\Programy\\fastCGI\\Debug\\log.log", "ab");
	fwrite(log, 1, logLen, file);
	fwrite("\n", 1, 1, file);
	fclose(file);
}
static void LogTxt(const char * log)
{
	Log(log, strlen(log));
}
static void LogErrCode(const char * log, int logLen, int err)
{
	char	buf[1024];

	itoa(err, buf, 10);

	strcat(buf, log);
	LogTxt(buf);
}

int main(int argc, char * argv[])
{
	HANDLE		pipe;
	BOOL		fSuccess = FALSE;
	wchar_t		pipeName[1024];

	LogTxt(getenv("_FCGI_X_PIPE_"));

	while (1)
	{
		pipe = CreateFileA(getenv("_FCGI_X_PIPE_"), GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);

		// Break if the pipe handle is valid.
		if (pipe != INVALID_HANDLE_VALUE)
			break;

		// Exit if an error other than ERROR_PIPE_BUSY occurs.
		if (GetLastError() != ERROR_PIPE_BUSY)
		{
			LogErrCode(" Could not open pipe.", 21, GetLastError());
			return -1;
		}

		// All pipe instances are busy, so wait for 2 seconds.
		if (!WaitNamedPipeA(getenv("_FCGI_X_PIPE_"), 2000))
		{
			LogErrCode(" Could not open pipe: 2 second wait timed out.", 45, GetLastError());
			return -1;
		}
	}
	return 0;
}

When I read from stdin I get the request, but how to send a response?

This is my source code to read from stdin:

int main()
{
	char	buf[1024];
	HANDLE	hStdin;
	HANDLE	hStdout;
	HANDLE	hStderr;
	DWORD	bytes;

	hStdin = GetStdHandle(STD_INPUT_HANDLE);
	hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
	hStderr = GetStdHandle(STD_ERROR_HANDLE);

	if (hStdin == INVALID_HANDLE_VALUE)
		LogErrCode("STDIN", 5, GetLastError());

	// hStdout and hStderr always return INVALID_HANDLE_VALUE
	if (hStdout == INVALID_HANDLE_VALUE)
		LogErrCode("STDOUT", 6, GetLastError());
	if (hStderr == INVALID_HANDLE_VALUE)
		LogErrCode("STDERR", 6, GetLastError());

	ReadFile(hStdin, buf, 1024, &bytes, 0);
	return 0;
}

Thanks for any advice