Rounded Corners

[spyk3]

First of all, I can't take full credit for this, as I borrowed this myself from somewhere, but can't remember where now.
Anywho, I've noticed quite a many request in this and other forums to figure out how to round corners of an object.
So i'm posting an Official Function that makes it very Easy.
Simply Copy & Paste the following function into your form somewhere

Private Sub makeRound(ByVal vObject As Object)
        Dim p As New Drawing2D.GraphicsPath()
        p.StartFigure()
        p.AddArc(New Rectangle(0, 0, 20, 20), 180, 90)
        p.AddLine(20, 0, vObject.Width - 20, 0)
        p.AddArc(New Rectangle(vObject.Width - 20, 0, 20, 20), -90, 90)
        p.AddLine(vObject.Width, 20, vObject.Width, vObject.Height - 20)
        p.AddArc(New Rectangle(vObject.Width - 20, vObject.Height - 20, 20, 20), 0, 90)
        p.AddLine(vObject.Width - 20, vObject.Height, 20, vObject.Height)
        p.AddArc(New Rectangle(0, vObject.Height - 20, 20, 20), 90, 90)
        p.CloseFigure()
 
        vObject.Region = New Region(p)
    End Sub

For more of a rounded curve try replacing all of the "20"s with "40"
To make use on almost any object in a form simply:

makeRound(yourObject)
'    Like
makeRound(TreeView1)

Tada!

[squared]

Option Strict-compliant, safer, and more customizable version:

    Private Sub MakeRound(ByVal c As Control, Optional ByVal radius As Integer = 20)
        Dim p As New Drawing2D.GraphicsPath()
        p.AddArc(New Rectangle(0, 0, radius, radius), 180, 90)
        p.AddLine(20, 0, vObject.Width - 20, 0)
        p.AddArc(New Rectangle(vObject.Width - radius, 0, radius, radius), -90, 90)
        p.AddLine(vObject.Width, 20, vObject.Width, vObject.Height - radius)
        p.AddArc(New Rectangle(vObject.Width - radius, vObject.Height - radius, radius, radius), 0, 90)
        p.AddLine(vObject.Width - 20, vObject.Height, 20, vObject.Height)
        p.AddArc(New Rectangle(0, vObject.Height - 20, 20, 20), 90, 90)
        p.CloseFigure()

        c.Region = New Region(p)
    End Sub

P.S. radius should actually be diameter.

[boops boops]

The lines with AddLine are unnecessary. Since it is all one figure, the path will extend from the end point of one arc to the next. BB

[spyk3]

The lines with AddLine are unnecessary. Since it is all one figure, the path will extend from the end point of one arc to the next. BB

Lol, I kinda figured as much, just figured I'd share the easy recipe I've been using with others questioning how to do it. I'll maybe break it down and explain it as well as perfect it later, right now, I'm extremely overworked and underpayed and have to get back to that, lol.