Running a a form from a form

[Volte]

You have to show the form before you run the Application.

[aewarnick]

It worked! I have another question.

 

Does Application.Run(); only work in Main?

anywhere else I put it the program just immediately shut down.

[Volte]

Yes; Main is the only sub that executes on its own (on the starting

of the app). The only way to get any other subs to run is to call them

(directly or indirectly) through the Sub Main (In C#... in VB.NET, you

don't even need an Application.Run statement for the program to

start).

[aewarnick]

I tried removing Application.Run here but the program immediately closed.

 

static void Main()

{

Form3 frm3=new Form3();

frm3.Show();

Application.Run();

}

[Volte]

Is that sub in the same form that is set as your startup object?

Right click on the project in the solution explorer and click Properties.

There will be a "Startup Object" setting. Make sure it is set to the

same form that the Sub Main is located in.

[aewarnick]

I went to Set startup projects and they are both under

 

WindowsApplication2 namespace.

[Volte]

Yes, but there should be two selections available:

"WindowsApplication2.Form1" and "WindowsApplication2.Form2"

 

If Sub Main is in Form1, you want the startup object to be the first one,

otherwise you want it to be the second one.

[aewarnick]

You mean this picture (attatched)

[divil]

No, you're looking at the solution properties. You want the project properties. Right-click on your project node, not the solution node, and click properties.

[aewarnick]

I found it and changed the starting object to form1 (it was my only choice.) but it still does the same thing when I remove Run.

[Volte]

Oh, when you remove the Run command? You need the Run

command in the Sub Main of your startup object; sorry, I misread your

original statement.

 

If you take out the Run statement, then your program is never really

executing; it's simply starting the program, and closing it immediately

because there's nothing to do. When you use the Run command,

it starts a standard Windows message loop for the window, meaning

that the window becomes active, and recieves events and various

window messages that are sent to it. Without a message loop and

a thread to run it on, there is no program.

[aewarnick]

(In C#... in VB.NET, you

don't even need an Application.Run statement for the program to

start).

 

I tried removing that and also just writing Run(); but it never works without

 

Application.Run();

Is that the way it should be?

 

Also, I noticed in the properties window something about having more than one Main(). Is that possible?

[Volte]

I meant that in C# you do need it, but in VB.NET you don't.

Yes, Application.Run(); is correct. Sorry for being unclear.

[aewarnick]

Ok. That clears things up alot. Thanks so much for all your help. I am learning things.