The Upgrade Wizard converts a Frame control into either a GroupBox control or a Panel control, depending on whether the Frame control has a border at design-time. Likewise, VB Migration Partner converts a Frame control into a VB6Frame control (which inherits from GroupBox) or a VB6FrameNoBorder control (which inherits from Panel).
The problem is that the .NET GroupBox control always has a visible border, therefore you can’t later hide the border by assigning 0 to the BorderStyle property. In VB.NET projects created by the Upgrade Wizard this assignment causes a compilation error; in VB.NET projects created by VB Migration Partner this assignment compiles fine but generates a warning coming from the Obsolete attribute associated with the BorderStyle property.
If the Frame control is borderless at design-time – and is therefore converted into a Panel or a VB6FrameNoBorder control, which inherits from Panel – then assignments to the BorderStyle compile and run fine. However, the visual effect is slightly different from VB6, because the border runs along the control’s edge (in VB6 it runs a few pixels away from the edge). Moreover, the Panel control and the VB6FrameNoBorder control can’t display a caption, therefore any assignment to the Text or Caption property is ignored.