GroupBoxの枠線を非表示にする - VB.net
タイトルの通り
Private Sub GroupBoxHideBorderLine(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) _ Handles ImportDataTypeGroupBox.Paint Dim rct As Rectangle = sender.ClientRectangle ControlPaint.DrawBorder3D(e.Graphics, rct, Border3DStyle.Flat, Border3DSide.Middle) rct = Nothing End Sub