Pilz.UI: convert to C#

Pilz.UI/Utilities/User32Bridge.cs

@@ -0,0 +1,9 @@
+using System.Runtime.InteropServices;
+
+namespace Pilz.UI;
+
+public static class User32Bridge
+{
+    [DllImport("user32.dll", CharSet = CharSet.Auto)]
+    internal static extern int SendMessage(nint hWnd, int Msg, bool wParam, int lParam);
+}