Custom Routines (VB.Net and Delphi Prism Cross Reference Guide)

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

In Prism, everything is within a class (just like with C#, VB.Net, and Java). So you create class methods using the method keyword. Alternatively, you can use procedure or function if you want the compiler to enforce returning or not returning a value.

[function/procedure] RoutineName : ReturnType; 

As with C++, your custom routine must come before it's first usage or you have to prototype it in the Interface section.

method Form1.IntroduceYourself;
begin
  MessageBox.Show("Hello, I do not have a name yet.");
end; 
 
procedure Form1.SayHello(pName: String);
begin
  MessageBox.Show("Hello " + pName);
end;

function Form1.Add(p1, p2 : Double): Double;
begin
  Result := p1 + p2;
end;

 Delphi Prism Custom Routines (method, procedure, function)