Equation Editor interface support

PROMS/Volian.Controls.Library/VlnFlexGrid.cs

@@ -4453,12 +4453,12 @@ namespace Volian.Controls.Library
 	/// <summary>
 	/// RTF Should only be used if the contents of the richtextbox are to be converted to an image.
 	/// </summary>
-	class RTF : StepRTB
+	public class RTF : StepRTB
 	{
 		// messages used by RichEd20.dll
 		internal const int
-			WM_USER = 0x0400,
-			EM_FORMATRANGE = WM_USER + 57;
+		WM_USER = 0x0400,
+		EM_FORMATRANGE = WM_USER + 57;
 
 		// FORMATRANGE is used by RichEd20.dll to render RTF
 		internal struct FORMATRANGE