diff --git a/reference/OpenGL/main.cpp b/reference/OpenGL/main.cpp
index bbf769177..6f8c2ecd9 100644
--- a/reference/OpenGL/main.cpp
+++ b/reference/OpenGL/main.cpp
@@ -6,7 +6,7 @@ using namespace Upp;
 struct OpenGLExample : GLCtrl {
 	Point point;
 
-	virtual void GLPaint() {
+	void GLPaint() override {
 		StdView();
 
 		double t = 13 * point.x;
@@ -56,11 +56,7 @@ struct OpenGLExample : GLCtrl {
 		glEnd();
 	}
 	
-	virtual void GLResize(int w, int h) {
-		glViewport(0, 0, (GLsizei)w, (GLsizei)h);
-	}
-
-	virtual void LeftDown(Point, dword)
+	void LeftDown(Point, dword) override
 	{ // Demonstrates how to create a screenshot of opengl widget
 		ExecuteGL([&] {
 			Size sz=GetSize();
@@ -88,7 +84,7 @@ struct OpenGLExample : GLCtrl {
 		});
 	}
 
-	virtual void MouseMove(Point p, dword) {
+	void MouseMove(Point p, dword) override {
 		point = p;
 		Refresh();
 	}
@@ -100,6 +96,7 @@ GUI_APP_MAIN
 	TopWindow win;
 	OpenGLExample gl;
 	gl.SetFrame(InsetFrame());
+	win.Title("OpenGL Reference");
 	win.Add(gl.HSizePos(10, 10).VSizePos(10, 10));
 	win.Sizeable().Zoomable();
 	win.Open();
diff --git a/uppsrc/GLCtrl/Copying b/uppsrc/GLCtrl/Copying
new file mode 100644
index 000000000..49801fad5
--- /dev/null
+++ b/uppsrc/GLCtrl/Copying
@@ -0,0 +1,22 @@
+Copyright (c) 1998, 2023, The U++ Project
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted
+provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of
+   conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice, this list of
+   conditions and the following disclaimer in the documentation and/or other materials provided
+   with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/uppsrc/GLCtrl/GLCtrl.upp b/uppsrc/GLCtrl/GLCtrl.upp
index e2b6336b3..63f9b024d 100644
--- a/uppsrc/GLCtrl/GLCtrl.upp
+++ b/uppsrc/GLCtrl/GLCtrl.upp
@@ -12,5 +12,8 @@ file
 	GLCtrl.h,
 	Win32GLCtrl.cpp,
 	XGLCtrl.cpp,
-	GLCtrl.cpp;
+	GLCtrl.cpp,
+	Info readonly separator,
+	src.tpp,
+	Copying;
 
diff --git a/uppsrc/GLCtrl/src.tpp/GLCtrl_en-us.tpp b/uppsrc/GLCtrl/src.tpp/GLCtrl_en-us.tpp
new file mode 100644
index 000000000..0b2be27e8
--- /dev/null
+++ b/uppsrc/GLCtrl/src.tpp/GLCtrl_en-us.tpp
@@ -0,0 +1,30 @@
+topic "GLCtrl";
+[i448;a25;kKO9; $$1,0#37138531426314131252341829483380:structitem]
+[l288;2 $$2,0#27521748481378242620020725143825:desc]
+[0 $$3,0#96390100711032703541132217272105:end]
+[H6;0 $$4,0#05600065144404261032431302351956:begin]
+[i448;a25;kKO9;2 $$5,0#37138531426314131252341829483370:codeitem]
+[ $$0,0#00000000000000000000000000000000:Default]
+[{_} 
+[ {{10000@(113.42.0) [s0; [*@7;4 GLCtrl]]}}&]
+[s0;2 &]
+[s1;:Upp`:`:GLCtrl: [* GLCtrl] [@(0.0.255) :] [@(0.0.255) public] Ctrl&]
+[s0;l288;%% [2 This class is responsible for displaying 3D graphics 
+via OpenGL. It directly inherits from ][^topic`:`/`/CtrlCore`/src`/Ctrl`_en`-us`#Ctrl`:`:class^2 C
+trl][2  class from CtrlCore package.]&]
+[s3; &]
+[ {{10000F(128)G(128)@1 [s0;%% [* Public Member List]]}}&]
+[s0;2 &]
+[s5;:Upp`:`:GLCtrl`:`:WhenGLPaint: Callback [* WhenGLPaint]&]
+[s2;%% Callback that can be assigned in order to provide custom rendering 
+instructions.&]
+[s3; &]
+[s0;2 &]
+[ {{10000F(128)G(128)@1 [s0;%% [* Protected Method List]]}}&]
+[s3; &]
+[s5;:Upp`:`:GLCtrl`:`:GLPaint`(`): [@(0.0.255) virtual void] [* GLPaint]()&]
+[s2;%% The method responsible for handling OpenGL rendering. Can 
+be overridden in child class. If the method is not overridden 
+it is by default executing [^topic`:`/`/GLCtrl`/src`/GLCtrl`_en`-us`#Upp`:`:GLCtrl`:`:WhenGLPaint^ W
+henGLPaint] callback.&]
+[s5;i0;O_; ]]
\ No newline at end of file