How link Visual C++ 2012 with PostgreSQL

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C++/CLI

PostgreSQL

Hi Guys!!
I'm beginner in Visual C++, so I want your help.
I wrote simple application, which need database (PostgreSQL). The source code in c++ is ok,
(I hope so :)). In this application is DataViewGird which should connect to database and show me rows and column, but after compilation (without bugs) and running there is grey area without any tables.
I think, problem is in database. Of coruse I have added drivers for SQL to my project and directives in using namespaces. Below, I will show you my code and printscreen from pgAdminIII,where I create my database and there added four colums.

#pragma endregion
		private: NpgsqlConnection^ connection;
		private: NpgsqlCommand^ selectcomm;

private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) 
			 {
 connection = gcnew NpgsqlConnection("server=127.0.0.1; Port=5030; UserId=postgres;  Database=utwory");

                odswiez();
			 }
private: System::Void odswiez()
			 {
		selectcomm = gcnew NpgsqlCommand("select * from plyty", connection);
				 DataSet^ ds = gcnew DataSet("Dane o plytach");
				 NpgsqlDataAdapter^ adapter = gcnew   NpgsqlDataAdapter(selectcomm);
				 adapter ->Fill(ds);
				 bindingSource1->DataSource=ds->Tables[0];
				 dataGridView1->DataSource=bindingSource1;
			 }

I don't know what is wrong...
Do you have any tutorials for this or ideas how create database properly??