Managed C++/CLI

Microsoft SQL-DMO (ODBC SQLState: 42000) Error: -2147221334
[Microsoft][ODBC SQL Server Driver][SQL Server]Line 1: Incorrect syntax near '12'.
Unknown error 0x800400AA

<br />
<br />
Qry=spSQLServer->ExecuteWithResults((_bstr_t)"USE 12",(LONG)"IF EXISTS(SELECT * FROM sysdatabases WHERE name='12'".GetLength());<br />

wchar_t* SXNative::ReturnString()
{
  wchar_t retString[128];  
  wchar_t Test[] = L"This is a dummy";

  wcscpy_s(retString, sizeof(Test) / sizeof(wchar_t), Test);

  return retString;
}

String^ ManagedWrapper::Managed_ReturnString()
{
  wchar_t* test = nat_ptr->ReturnString();
  return gcnew String(test);
}

#pragma once
namespace PR {

    using namespace System;    using namespace System::ComponentModel;    using namespace System::Collections;
    using namespace System::Windows::Forms;    using namespace System::Data;    using namespace System::Drawing;

    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {   InitializeComponent();
            //TODO: Add the constructor code here
        }
    protected:
        /// Clean up any resources being used.
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::ComboBox^  comboBox1;
    protected:
    private: System::Windows::Forms::ComboBox^  comboBox2;
    private:
        /// Required designer variable.
        System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        void InitializeComponent(void)
        {
            this->comboBox1 = (gcnew System::Windows::Forms::ComboBox());
            this->comboBox2 = (gcnew System::Windows::Forms::ComboBox());
            this->SuspendLayout();
            // comboBox1
            this->comboBox1->FormattingEnabled = true;
            this->comboBox1->Items->AddRange(gcnew cli::array< System::Object^  >(2) {L"METAL", L"PLASTIC"});
            this->comboBox1->Location = System::Drawing::Point(81, 80);
            this->comboBox1->Name = L"comboBox1";
            this->comboBox1->Size = System::Drawing::Size(121, 21);
            this->comboBox1->TabIndex = 0;
            this->comboBox1->Text = L"METAL";
            // comboBox2
            this->comboBox2->FormattingEnabled = true;
            this->comboBox2->Items->AddRange(gcnew cli::array< System::Object^  >(5) {L"2", L"3", L"4", L"5", L"6"});
            this->comboBox2->Location = System::Drawing::Point(81, 126);
            this->comboBox2->Name = L"comboBox2";
            this->comboBox2->Size = System::Drawing::Size(121, 21);
            this->comboBox2->TabIndex = 1;
            this->comboBox2->Text = L"2";
            this->comboBox2->SelectedIndexChanged += gcnew System::EventHandler(this, &Form1::comboBox2_SelectedIndexChanged);
            // Form1
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(292, 266);
            this->Controls->Add(this->comboBox2);
            this->Controls->Add(this->comboBox1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->ResumeLayout(false);
        }
#pragma endregion
     private: System::Void comboBox2_SelectedIndexChanged(System::Object^  sender, System::EventArgs^  e) {
             }
    };
}