Split the database objects out into a seperate project. Needs renaming in some areas and updates in the installer. Otherwise first version of a proper data DLL file.

AdvertsingProfitControl/FrmLoginForm.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Data.SqlClient;
 using System.Windows.Forms;
+using AdvertisingProfitControlData;
 using Microsoft.Win32;
 
 namespace AdvertsingProfitControl
@@ -56,7 +57,7 @@ namespace AdvertsingProfitControl
                 }
                 ConnectionSuccessful = true;
                 //Try to initialize the database.
-                var db = new AdvertisingProfitControlModel();
+                var db = new AdvertisingProfitControlModel(connectionString);
                 //Force the UI thread to draw the label's text so the user can see it.
                 informationLabel.Text = @"Connection successful! Preparing main form...";
                 informationLabel.Invalidate();