mfc, How to Duplicate CString's Default Data Type

1. How to convert CString object to data type?

How can I convert CString from a EDIT control Dialog to data type for 
calculation?

thanks, 

2. how to convert CString object to data type

3. default data type for global variables

"qazmlp" < XXXX@XXXXX.COM > wrote in message
news: XXXX@XXXXX.COM ...
> This one compiles fine:
>
> // fileName.C
> someName = 2 ;
>
> int main()
> {
>   someName = someName + 2 ;
> }

It probably compiles because of the .c extension in file name. The .c
extension causes some compilers to behave like a C compiler. In C++ you
must always specify the type, which is a good practice anyway, even in
C.

> But, the following gives compilation error:
>
> int main()
> {
>   someName = 2 ;
>   someName = someName + 2 ;
> }
>
> Why? I would like to have the C++ standard word also about this.
> Also, what is the default data type assumed in the first case?

This is is really a C question, it is not valid C++ code. C defaults to
int when no type is specified.

4. C# data type keywords v. .Net data types - CSharp/C#

5. How to convert CString type to LPCSTR type

Hi,
    I have a CString type variable, and I need to convert it's to LPCSTR 
type ,what I can do!

example:
    CString m_strExecFile(_T("C:\\\\aa.exe"));
    next I want to call WinExec Command to execute this file
    LPCSTR lpcstr ;
    lpcstr = m_strExecFile.GetBuffer();
    WinExec(lpcstr,SW_SHOW);

    BUT the compilier tells me it can not convert w_char * to LPCSTR type!

Why?

ps. I use vs2005 program in UNICODE mode.

Any helpful ideas would be highly appreciated!

-joseph 

6. Default type-value for template parameter type

7. Derived CAsyncSocket sends duplicate data?

I'm at a loss here. I've looked at it, and it's probably something
simple, but can someone explain why my derived class sends duplicate
sets of data occasionally (IE 1 call to Send makes it received twice on
the other end)?

As far as I can tell, it only occurs when the system is under high CPU
load.

Thanks in advance.

Josh McFarlane

--------
>From Header File:
enum	SendStatus				//State of the Send Buffer
	{
		SEND_EMPTY,					//Empty Send Queue
		SEND_ACTIVE					//Sending currently in progress
	};
	CCriticalSection	ctSender;
	SendStatus			c_SendStatus;
	size_t				bytesSent;
	size_t				sendlength;
	std::vector<BYTE>	outBuffer;
-----------

>From CPP:

int		CInternalSocket::Send(const void* lpBuf, int nBufLen, int)
{
	//Need to add DWORD to buffer before sending
	DWORD TotalLength = nBufLen + sizeof(DWORD);
	DWORD Length = htonl(nBufLen);
	{
		CSingleLock lock(&ctSender);
		lock.Lock();
		switch (c_SendStatus)
		{
		case SEND_EMPTY:
			{
				bytesSent = 0;
				sendlength = TotalLength;
				outBuffer.resize(TotalLength, 0);
				BYTE* p = &outBuffer[0];
				memcpy(p, &Length, sizeof(DWORD));
				p += sizeof(DWORD);
				memcpy(p, lpBuf, nBufLen);
				c_SendStatus = SEND_ACTIVE;
				break;
			}

		case SEND_ACTIVE:
			{
				size_t oldSize = outBuffer.size();
				sendlength = oldSize + TotalLength;
				outBuffer.resize(sendlength, 0);
				BYTE* p = &outBuffer[oldSize];
				memcpy(p, &Length, sizeof(DWORD));
				p += sizeof(DWORD);
				memcpy(p, lpBuf, nBufLen);
				break;
			}

		}
	}
	OnSend(ERROR_SUCCESS);
	return nBufLen;
}

void	CInternalSocket::OnSend(int nErrorCode)
{
	CSingleLock lock(&ctSender);
	lock.Lock();
	if (nErrorCode != ERROR_SUCCESS)
	{
		//Handle initial socket errors here.
		if(pInterface)
		{
			pInterface->PostThreadMessage(UWM_SOCKET_SENDERROR, nErrorCode,
NULL);
		}
		return;
	}
	//Check buffer to make sure that it has data to be sent.
	size_t bytesToSend = sendlength - bytesSent;
	BYTE* p = &outBuffer[bytesSent];
	while(bytesToSend > 0)
	{ //Bytes to send
		int len = CAsyncSocket::Send(p, bytesToSend);
		if (len == SOCKET_ERROR)
		{ //Send Error
			int lastErr = ::GetLastError();
			if (WSAEWOULDBLOCK == lastErr || WSAENOTCONN == lastErr)
			{
				break;
			}
			else
			{
				if(pInterface)
				{
					pInterface->PostThreadMessage(UWM_SOCKET_SENDERROR, lastErr,
NULL);
				}
				break;
			}
		} //Send Error
		bytesToSend -= len;
		bytesSent += len;
		p += len;
	} //Bytes to Send
	if (bytesSent >= outBuffer.size())
	{
		bytesSent = 0;
		c_SendStatus = SEND_EMPTY;
	}
}

8. std::list Duplicates with Different Data