Problem with SQL_LONGVARBINAY

Hi,
There's a problem when insert a SQL_LONGVARBINARY(lo) column in the following way:
Use SQLBindParameter(...SQL_DATA_AT_EXEC)
and SQLParamData, SQLPutData.
The last time SQLParamData revoke a crash!
This is the sample code:
for (...)
{
sdw = SQL_DATA_AT_EXEC;
rc = SQLBindParameter(hstmt, w, SQL_PARAM_INPUT,
SQL_C_TCHAR, rgFields[ind].wSQLType,
rgFields[ind].precision, rgFields[ind].scale,
(LPTSTR)(((UDWORD)ind)+BIND_PARM_OFFSET), 0, &sdw);
}
rc = SQLExecDirect(hstmt, lpqt->sz, SQL_NTS);
if (SQL_NEED_DATA != rc)
return;
for(ind = 0; ind <= cTypes; ind++)
{
rc = SQLParamData(hstmt, &ptr);
if(rc != SQL_NEED_DATA)
break;

pch = qtMakeData(...);

if(*pch) {
rc = SQLPutData(hstmt, pch, SQL_NTS);
} else {
rc = SQLPutData(hstmt, (LPTSTR)IGNORED, SQL_NULL_DATA);
}
}

please check, thanks and regards!

　　　　　　　　Han
　　　　　　　　zhouhanok(at)vip(dot)sina(dot)com
　　　　　　　　　　2003-03-17