C / C++ / MFC

Raj Prathap wrote:

whether the first byte is the data or the length??

BSTR bstrLengthTest = ::SysAllocString( L"Nibu" );
DWORD dwLength = *(DWORD*)((DWORD)bstrLengthTest-sizeof(DWORD));
cout << endl<< "String length in bytes is: " <<  dwLength << endl;

Raj Prathap wrote:

how the compiler identifies.

LPWSTR lpw<br />
BSTR bst

Raj Prathap wrote:

My doubt is how at run time the decision on the first byte is decided?

Raj Prathap wrote:

how the compiler identifies.

SQLRETURN ret;
SQLSMALLINT pcbConnStrOut;

if(drvConn == sqlPrompt && hWnd == NULL)
    return FALSE;

if(m_lConnectionTimeout > 0)
    SQLSetConnectAttr(m_hDbc, SQL_ATTR_CONNECTION_TIMEOUT, (SQLPOINTER)m_lConnectionTimeout, 0);

SQLSetConnectAttr(m_hDbc, SQL_ATTR_LOGIN_TIMEOUT, (SQLPOINTER)m_lLoginTimeout, 0);

ret = SQLDriverConnect(m_hDbc,
                        hWnd,
                        (SQLCHAR*)szConnStr,
                        SQL_NTS,
                        (SQLCHAR*)szConnStrOut,
                        sizeof(szConnStrOut),
                        &pcbConnStrOut,
                        (SQLUSMALLINT)drvConn);

m_bIsConnected = ret == SQL_SUCCESS || ret == SQL_SUCCESS_WITH_INFO;
return m_bIsConnected;

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The only programmers that are better that C programmers are those who code in 1's and 0's

Programm3r
My Blog: ^_^

Programm3r wrote:

...there is no problem with it...

 // getDUCNames Function
 if (!pdb.DriverConnect(lpSapDsnStr))
	return;
 // CODBCDatabase::DriverConnect function
	ret = SQLDriverConnect(m_hDbc,
....

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The only programmers that are better that C programmers are those who code in 1's and 0's

Programm3r
My Blog: ^_^

estherpappa wrote:

if i type the item in the edit box mean it must add into the listbox.

Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_

CString strText;
m_edit.GetWindowText(strText);
m_listbox.AddString(strText);