How do I set the default form in vb.Net?

1. Right-click on your project in solution explorer.
2. Choose properties.
3. Select the Application Tab.
4. Select your form from the dropdown under 'startup form'

In the Project Properties, there's a field called "Startup form" - select your form in there.

Right-click your Project within the Solution Explorer. Choose Properties. Select the Web tab on the left-hand side. Under the Start Page section, define the Specific Page you would like to default to when the application is launched. Save your changes.