Form Fundamentals

Hi,

After browsing this site for three months, I have realised that my attempt to learn VB.NET has sufferred from many gaps, so I have started to go through a re-learning schedule. That took me to

http://samples.gotdotnet.com/quickstart/winforms/

Their very first coding is

VB Code:

Imports System
Imports System.ComponentModel
Imports System.Drawing
Imports System.Windows.Forms
 
Namespace Microsoft.Samples.WinForms.VB.SimpleHelloWorld
 
    Public Class SimpleHelloWorld
         Inherits System.Windows.Forms.Form
 
        'Run the application
        <STAThread()> Shared Sub Main()
            System.Windows.Forms.Application.Run(New SimpleHelloWorld())
        End Sub
 
        Public Sub New()
            MyBase.New()
            Me.Text = "Hello World"
        End Sub
    End Class
 
End Namespace

In experimenting with it I found that you could remove
"Imports System
Imports System.ComponentModel
Imports System.Drawing
Imports System.Windows.Forms"

and the programme would still work O.K. Can anyone tell me if there is any reason for including such apparently unnecessary code?


Also, the following seems to be unnecessary:

"Inherits System.Windows.Forms.Form" as

"Inherits Form"

appears to work perfectly O.K. (with or without the foregoing Imports)

Finally, the following also appears to be unnecessary

" <STAThread()> Shared Sub Main()"

as

" Shared Sub Main()"

works O.K. on its own. Anyone know why Com interoperability is put here?

Many thanks for any input.


EDIT: I see my [VB Code] is not working. Anyone know why?

you have to use [vbcode/] without any space...


Umm I think they import the System namespace because a lot of the basic stuff that you will end up using in your app is in the System namespace and so this way yuo dont have to type System.Blah blah everytime....

Forms works same as System.Windows.Forms.Form becauses of this import statement: Imports System.Windows.Forms That basically means that you can access anything in that namespace without having to type the whole thing every time. Why do they put the compelete thing? eeh I dont know, I guess just because:D it's probably to point out where exactly they are inheriting from, dunno really:D

umm and I dont know what statThread does

Hi MrPolite,

So, none of it is necessary? Yet Microsoft are teaching this for experienced programmers new to VB.NET!!


"umm and I dont know what statThread does"

It introduces COM interopability, but I see no need for it in the sample they used. It allows you to use DAO and ADO amongst other things.


Many thanks.

well yeah it's not necessary but I guess they always put it there just to make it more clear... you may wanna ask some more advanced users here, because I'm not officially a programmer, at least not yet:D

bleh. i think it'd be better to start out with not using those. do it the harder way (well not necessarily in all cases but in this case) and when you get better take the shortcuts. that's my thinking.

you can just ignore me. i don't know much about programming or vb.net anyway. just learning. :D