使用ODBC连接SQL Server数据源的问题

使用ODBC连接数据源时出现如图所示的错误，请各位大侠给予指导：

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说说是哪一行错的？
短短短短

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编译可以通过，连接数据源时出现该错误…

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代码如下：
C/C++ code:
SQLRETURN rtcode;
//Distribute ODBC Environment
SQLHENV henv;
rtcode=SQLAllocHandle(SQL_HANDLE_ENV,SQL_NULL_HANDLE,&henv);
if (rtcode!=SQL_SUCCESS)
{
//TRACE("Can not allocate env handle \n");
MessageBox("Can not allocate env handle ","Tips",MB_OK);
}

//Version Settings
rtcode=SQLSetEnvAttr(henv,SQL_ATTR_ODBC_VERSION,(void *)SQL_OV_ODBC3,0);
if (rtcode!=SQL_SUCCESS)
{
//TRACE("Can not set ODBC Version\n");
MessageBox("Can not set ODBC Version","Tips",MB_OK);
}

//Distribute Connect Handle
SQLHDBC hdbc;
rtcode=SQLAllocHandle(SQL_HANDLE_DBC,henv,&hdbc);
if (rtcode!=SQL_SUCCESS )
{
//TRACE("Can not allocate Connect Handle\n");
MessageBox("Can not allocate Connect Handle","Tips",MB_OK);
}

//Connection Attributes Settings
rtcode=SQLSetConnectAttr(hdbc,SQL_LOGIN_TIMEOUT,(void*)5,0);
if (rtcode!=SQL_SUCCESS)
{
//TRACE("Error in set connect attribute\n");
MessageBox(&q