Cross Ref > Language Details

VB.Net is a fully OOP language so both Subs and Functions are methods of a class. A Sub does not return a value while a Function does.

Syntax Example:   Private Sub DoSomething(ByVal pMsg As String) '...some code. End Sub Private Function GetAge(ByVal x As String) As Integer GetAge = 7 End Function

ASP Classic is a non-OOP language with some OOP features. It offers both Subs and Functions. A Sub does not return a value while a Function does. When Subs and Functions are used in a defined class, they become the methods of the class.

Sub SayHello(ByVal pName)
  Response.Write "Hello " + pName + "!<br>"
End Sub
 
Function Add(ByRef pN1, ByRef pN2)
  Add = pN1 + pN2
End Function

 ASP Classic Custom Routines (Sub, Function)

Since all the .Net languages compile into intermediate language (IL), and not to a specific CPU, they do not provide support for inline assembler code.

In VB.Net, inlining is automatically done for you by the JIT compiler for all languages and in general leads to faster code for all programmers whether they are aware of inlining or not.

VB.Net supports both method and operator overloading.

For method overloading, you either use implicit overloading (no special syntax like C#) or use the Overloads keyword. If you use the Overloads keyword, all overloaded methods with the same name in the same class must include the Overloads keyword.

 VB.Net Overloading (Overloads, or implicit)  

ASP Classic does not support any type of overloading.

• Operator - No.
• Method - No.

Some developers like to pass in an array and then handle the array for a pseudo technique. Although not overloading, it's useful.

 ASP Classic Overloading (Not Supported)

By Reference or Value
For parameters, you can optionally specify ByVal or ByRef. ByVal is the default if you don't specify which is changed from VB Classic (in VB Classic, ByRef was the default).

Syntax Example:   Private Function Add(ByRef a As Integer, _ ByRef b As Integer) As Integer   Add = a + b End Function

By Reference or Value
For parameters, you can optionally specify ByVal or ByRef. ByRef is the default if you don't specify.

Syntax Example:   Function SomeRoutine(ByRef pPerson, ByVal pName, Age)

To refer to the current instance of a class or structure, use the Me keyword. Me provides a way to refer to the specific instance in which the code is currently executing. It is particularly useful for passing information about the currently executing instance.

The Me keyword is also used as a modifier of the first parameter of an extension method.

You cannot use Me with static method functions because static methods do not belong to an object instance. If you try, you'll get an error.

Syntax Example:   Sub SetBackgroundColor(FormName As Form)   //FormName.BackColor = ...some color End Sub   //Pass Me. SetBackgroundColor(Me)

Same as VB. The Me keyword is a built-in variable that refers to the class where the code is executing.

Class Cyborg
 Public CyborgName
 

 Public Function IntroduceYourself() 
  'Using Me. Prints Cameron.
  Response.Write("Hi, my name is " & Me.CyborgName & ".")

  'The above is just a demo. You could also not include "Me." 

  'in this case because we are in context of Me now. Using Me 

  'makes more sense when you start to pass Me as a parameter 

  'to a method.

 End Function 
End Class