This is a little more informative, but you still can't tell what's really going on, because it's magic. If you could peer inside the My.Forms feature, you might find Visual Basic adding parallel form ...

Launch Microsoft Visual Studio and open one of your Visual Basic projects. Double-click that project's start-up form. Visual Studio displays the form in the Design window.

Microsoft has revealed it will support Visual Basic on .NET 5 but also that it has no plans to evolve the language. As Microsoft's .NET team notes, Visual Basic on .NET Core only supported Class ...

Visual Basic is supported in .NET 5, but it's a dead-end street. Several efforts have sprung up to keep the hallowed Visual Basic language alive in one form or another for a loyal, die-hard developer ...

Visual Basic for Applications (VBA) is a programming language embedded in Microsoft Office that can be used to automate processes and build functions.