compile error when following VC.NET tutorial...

Hello.
When I try to follow the instructions in this tutorial:
http://www.functionx.com/mysqlnet/vcnet/Lesson04.htm
I allways get these errors:
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AssemblyInfo.cpp
sqltest1.cpp
Form1.h(90) : error C3921: Use of S-prefixed strings requires /clr:oldSyntax command line option
        When compiling with /clr, an implicit conversion exists from string literal type to System::String^. If necessary to avoid ambiguity, cast to System::String^
Form1.h(91) : error C3921: Use of S-prefixed strings requires /clr:oldSyntax command line option
        When compiling with /clr, an implicit conversion exists from string literal type to System::String^. If necessary to avoid ambiguity, cast to System::String^
Form1.h(90) : error C3699: '*' : cannot use this indirection on type 'MySql::Data::MySqlClient::MySqlConnection'
        compiler replacing '*' with '^' to continue parsing
Form1.h(90) : error C2750: 'MySql::Data::MySqlClient::MySqlConnection' : cannot use 'new' on the reference type; use 'gcnew' instead
Form1.h(90) : error C2440: 'initializing' : cannot convert from 'MySql::Data::MySqlClient::MySqlConnection *' to 'MySql::Data::MySqlClient::MySqlConnection ^'
        No user-defined-conversion operator available, or
        Cannot convert an unmanaged type to a managed type
Form1.h(91) : error C3699: '*' : cannot use this indirection on type 'MySql::Data::MySqlClient::MySqlCommand'
        compiler replacing '*' with '^' to continue parsing
Form1.h(91) : error C2750: 'MySql::Data::MySqlClient::MySqlCommand' : cannot use 'new' on the reference type; use 'gcnew' instead
Form1.h(91) : error C2440: 'initializing' : cannot convert from 'MySql::Data::MySqlClient::MySqlCommand *' to 'MySql::Data::MySqlClient::MySqlCommand ^'

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where line 90 is the first one of this sequence:
MySqlConnection *conDatabase = new MySqlConnection(S"Data Source=localhost;Persist Security Info=yes");
MySqlCommand    *cmdDatabase = new MySqlCommand(S"CREATE DATABASE CarRental1;", conDatabase);

       conDatabase->Open();

       cmdDatabase->ExecuteNonQuery();
       conDatabase->Close();

So:
My questions:
I changed this to:

MySqlConnection ^conDatabase = gcnew MySqlConnection(L"Data Source=localhost;Persist Security Info=yes");
MySqlCommand    ^cmdDatabase = gcnew MySqlCommand(L"CREATE DATABASE CarRental1;", conDatabase);

       conDatabase->Open();

       cmdDatabase->ExecuteNonQuery();
       conDatabase->Close();

but just because the compiler told me to do so.
Is this OK ? (never worked with gcnew, and no experience with unicode)...

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