Thanks! It works now.

>Jess,
>
>>I created a project but not based on MM project. The form however was created based on MM Business Form. The problem is when I called class methods just like below it gives me an error:
>>

>>this.GetDataSet("SELECT * FROM Orders WHERE CustomerID "+sqlSOrders+" @CustomerID",
>>                this.CreateParameter("@CustomerID", sqlPOrders));
>>

>>error message is:
>>

>>NullReferenceException was unhandled!
>>Object reference not set to an instance of an object.
>>

>>Note: The same object class works in different form without change.
>
>If this is a non-MM .NET project, make sure you instantiate an MM .NET application object so the form and business objects have access to MM .NET service components.
>
>You can do the following:
>
>

1. Copy the App.cs file from C:\Program Files\Mere Mortals .NET Framework 2005\VC#\Templates\Windows Forms Template, copy it to your root project directory and add it to the project
   >
   >
2. At application startup, instantiate the application object before trying to access any data or display any form. For example:
   >
   >

   public static AppDesktop App;
   >
   >/// <summary>
   >/// Main application entry point
   >/// </summary>
   >[STAThread]
   >public static void Main()
   >{
   >	// Instantiate the Application Object
   >	App = new AppDesktop();
   >}

>
>Best Regards,