How to fix Connection execute error using ADO in C++ - c++

Question

I'm using ado to connect SQL Server in my C++ project.
So I want to insert/update my database and I wrote some queries (see the code) and I'm trying to execute my connection or command.
But it goes on an error at pConnection->Execute(InsertQuery, NULL, adCmdUnspecified);, it says Microsoft C++ exception: _com_error at memory location and in the debug window there is _hr with value _hr : DB_E_ERRORSINCOMMAND One or more errors occurred during processing of command. TYPE: HRESULT
I also tried to execute Command, but I have the same result as Connection.
Should I change adCmdUnspecified into something or am I go wrong somewhere?
What is the solution? Thank you in advance.
//connections above
VARIANT vNameStringType;
_bstr_t InsertQuery(L"Insert Into TestTB(AccountID, Name) Values(#AccountID, #Name)");
hr = pCommand.CreateInstance(__uuidof(Command));
pCommand->ActiveConnection = pConnection;
pCommand->CommandText = InsertQuery;
pCommand->CommandType = adCmdText;
for (int i = 0; i < size; i++)
{
a[i].name;
a[i].login;
vIntegerType.vt = VT_I4;
vIntegerType.intVal = a[i].login;
vNameStringType.vt = VT_BSTR;
vNameStringType.bstrVal = _bstr_t(a[i].name);
int DataExistCounter = 0;
NameParam = pCommand->CreateParameter(_bstr_t("#Name"), adVarChar, adParamInput, 150, _bstr_t(vNameStringType));
pCommand->Parameters->Append(NameParam);
AccIDParam = pCommand->CreateParameter("#AccountID", adInteger, adParamInput, sizeof(int), vIntegerType);
pCommand->Parameters->Append(AccIDParam);
pRecordset->MoveFirst();
while (!pRecordset->EndOfFile)
{
valFieldNam = pRecordset->Fields->GetItem("Name")->Value;
valFieldAcc = pRecordset->Fields->GetItem("AccountID")->Value;
if (valFieldAcc == a[i].login)
{
DataExistCounter++;
}
pRecordset->MoveNext();
}
if (DataExistCounter > 0)
{
//update
}
else
{
pConnection->Execute(InsertQuery, NULL, adCmdUnspecified);
}
}
pRecordset->Close();
pConnection->Close();
CoUninitialize();