revert to VB and update to new project file format

Pilz.UI/Utilities/DrawingControl.vb

@@ -0,0 +1,28 @@
+Imports System.Runtime.CompilerServices
+Imports System.Windows.Forms
+
+Namespace Utils
+
+    Public Module DrawingControl
+
+        Private Const WM_SETREDRAW = 11
+
+        <Extension>
+        Public Sub SuspendDrawing(control As Control)
+            SendMessage(control.Handle, WM_SETREDRAW, False, 0)
+        End Sub
+
+        <Extension>
+        Public Sub ResumeDrawing(control As Control)
+            ResumeDrawing(control, True)
+        End Sub
+
+        <Extension>
+        Public Sub ResumeDrawing(control As Control, redraw As Boolean)
+            SendMessage(control.Handle, WM_SETREDRAW, True, 0)
+            If redraw Then control.Refresh()
+        End Sub
+
+    End Module
+
+End Namespace