Created a "login" dialog form to grab the server name from the user. Now a valid connection must be made before the Main form loads.

AdvertsingProfitControl/Properties/Settings.Designer.cs

@@ -12,7 +12,7 @@ namespace AdvertsingProfitControl.Properties {
     
     
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "15.0.1.0")]
     internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
         
         private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
@@ -22,5 +22,17 @@ namespace AdvertsingProfitControl.Properties {
                 return defaultInstance;
             }
         }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("")]
+        public string ConnectionString {
+            get {
+                return ((string)(this["ConnectionString"]));
+            }
+            set {
+                this["ConnectionString"] = value;
+            }
+        }
     }
 }

AdvertsingProfitControl/Properties/Settings.settings

@@ -1,5 +1,9 @@
 <?xml version='1.0' encoding='utf-8'?>
-<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)" GeneratedClassNamespace="AdvertsingProfitControl.Properties" GeneratedClassName="Settings">
   <Profiles />
-  <Settings />
+  <Settings>
+    <Setting Name="ConnectionString" Type="System.String" Scope="User">
+      <Value Profile="(Default)" />
+    </Setting>
+  </Settings>
 </SettingsFile>