Compiling an VB.NET comprising Window Application & Class Library

[MKP]

Hi,

I have made a simple program of adding two numbers where i have defined the formula as a Function in the Class library Template.

And

am calling the Function from a Windows Application Template.

When i am debugging the program the error is "A project with an output type of class library cannot be started directly".


The code is as Below


Class Library Template

NAme of the file is Addittion.vb
------------------------------------------------------------------------------
Namespace BondF

Public Class Add

Public Function Add(ByVal a As Double, ByVal b As Double) As Double

Add = a+ b

End Function

End Class

End Namespace
-------------------------------------------------------------------------------


Windows Application Template
-------------------------------------------------------------------------------

Dim Sum as Double

Sum = Addittion.Add(1.1,2.1)
Msgbox(Sum)

-------------------------------------------------------------------------------

Is there any online material explaining the intricacies of working with Class Library Template ?

Thanx In Advance

[TheExtreme]

I am asumming you started a windows application and removed the form. Class libraries cannot be started directly. Add a Module to the project and put a "sub main" in it to start the application.

Public Sub Main()

'Your code here....

end sub

[Edneeis]

You may also just loaded the Class Library Project before the Windows Application Project in the same Solution. If so then you'll see them both in the Solution Explorer and one project name will be bolded. The Bolded item is what is set as teh startup object when debugging, to change this just right click on a project and choose, 'Set as Start Up...' from the menu.

[Pirate]

As I involved in that much these days , I compile my class to dll files by creating console application and just attaching that class , change from debug to release . It's faster and easier .You don't have to write any line of code .