http://www.codeproject.com/cs/database/linkAccessInCSharp.asp

Try that site.

And for your other problem:

if (textBox1.Text is equal to what you want)
{
// Move on
}
else
{
// Dont
}

To make it invisible use this code:

this.Hide();

BUT if you are hiding your main form, then you will have to use Application.Exit(); when you want to shut down the application. Otherwise it...

God you are fond of python ain't ya, mentioned all the time lol. Treat C# like a completely different language, don't try to make comparisons as that just leads to trouble:

StreamReader reader =...