diff --git a/include/drawinglayer/attribute/sdrallattribute3d.hxx b/include/drawinglayer/attribute/sdrallattribute3d.hxx
index 53d7a1f75aa7..e4e9c8b3acb3 100644
--- a/include/drawinglayer/attribute/sdrallattribute3d.hxx
+++ b/include/drawinglayer/attribute/sdrallattribute3d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRALLATTRIBUTE3D_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRALLATTRIBUTE3D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 
@@ -65,7 +64,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::overlay
 
-
-#endif // INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRALLATTRIBUTE3D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrfillattribute.hxx b/include/drawinglayer/attribute/sdrfillattribute.hxx
index 6ba140065d4c..3a88593a50d6 100644
--- a/include/drawinglayer/attribute/sdrfillattribute.hxx
+++ b/include/drawinglayer/attribute/sdrfillattribute.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRFILLATTRIBUTE_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRFILLATTRIBUTE_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <o3tl/cow_wrapper.hxx>
@@ -82,7 +81,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::attribute
 
-
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRFILLATTRIBUTE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrfillgraphicattribute.hxx b/include/drawinglayer/attribute/sdrfillgraphicattribute.hxx
index 4a39313d10aa..711e5a71850c 100644
--- a/include/drawinglayer/attribute/sdrfillgraphicattribute.hxx
+++ b/include/drawinglayer/attribute/sdrfillgraphicattribute.hxx
@@ -16,8 +16,8 @@
  *   except in compliance with the License. You may obtain a copy of
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRFILLGRAPHICATTRIBUTE_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRFILLGRAPHICATTRIBUTE_HXX
+
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <o3tl/cow_wrapper.hxx>
@@ -88,7 +88,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::attribute
 
-
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRFILLGRAPHICATTRIBUTE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrglowattribute.hxx b/include/drawinglayer/attribute/sdrglowattribute.hxx
index d4045bbc14f7..4212fdeb8737 100644
--- a/include/drawinglayer/attribute/sdrglowattribute.hxx
+++ b/include/drawinglayer/attribute/sdrglowattribute.hxx
@@ -7,8 +7,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRGLOWATTRIBUTE_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRGLOWATTRIBUTE_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <tools/color.hxx>
@@ -40,6 +39,4 @@ public:
 
 } // end of namespace drawinglayer::attribute
 
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRGLOWATTRIBUTE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrglowtextattribute.hxx b/include/drawinglayer/attribute/sdrglowtextattribute.hxx
index 6702bae72c14..94261c23b6ec 100644
--- a/include/drawinglayer/attribute/sdrglowtextattribute.hxx
+++ b/include/drawinglayer/attribute/sdrglowtextattribute.hxx
@@ -7,8 +7,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRGLOWTEXTATTRIBUTE_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRGLOWTEXTATTRIBUTE_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <tools/color.hxx>
@@ -40,6 +39,4 @@ public:
 
 } // end of namespace drawinglayer::attribute
 
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRGLOWTEXTATTRIBUTE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrlightattribute3d.hxx b/include/drawinglayer/attribute/sdrlightattribute3d.hxx
index b3c1fcaaabae..3a9b0f595997 100644
--- a/include/drawinglayer/attribute/sdrlightattribute3d.hxx
+++ b/include/drawinglayer/attribute/sdrlightattribute3d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLIGHTATTRIBUTE3D_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLIGHTATTRIBUTE3D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <o3tl/cow_wrapper.hxx>
@@ -69,7 +68,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::attribute
 
-
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLIGHTATTRIBUTE3D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrlightingattribute3d.hxx b/include/drawinglayer/attribute/sdrlightingattribute3d.hxx
index ae2155a542ab..8a78ea0a7ba5 100644
--- a/include/drawinglayer/attribute/sdrlightingattribute3d.hxx
+++ b/include/drawinglayer/attribute/sdrlightingattribute3d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLIGHTINGATTRIBUTE3D_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLIGHTINGATTRIBUTE3D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <o3tl/cow_wrapper.hxx>
@@ -80,7 +79,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::attribute
 
-
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLIGHTINGATTRIBUTE3D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrlineattribute.hxx b/include/drawinglayer/attribute/sdrlineattribute.hxx
index 9ff6ed42e614..301fd1af60bc 100644
--- a/include/drawinglayer/attribute/sdrlineattribute.hxx
+++ b/include/drawinglayer/attribute/sdrlineattribute.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLINEATTRIBUTE_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLINEATTRIBUTE_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <o3tl/cow_wrapper.hxx>
@@ -83,7 +82,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::attribute
 
-
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLINEATTRIBUTE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrlinestartendattribute.hxx b/include/drawinglayer/attribute/sdrlinestartendattribute.hxx
index afcf1fd6d369..27cb9d85ce60 100644
--- a/include/drawinglayer/attribute/sdrlinestartendattribute.hxx
+++ b/include/drawinglayer/attribute/sdrlinestartendattribute.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLINESTARTENDATTRIBUTE_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLINESTARTENDATTRIBUTE_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <o3tl/cow_wrapper.hxx>
@@ -82,7 +81,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::attribute
 
-
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRLINESTARTENDATTRIBUTE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrobjectattribute3d.hxx b/include/drawinglayer/attribute/sdrobjectattribute3d.hxx
index 21576a7c04d8..cd228d3d1af0 100644
--- a/include/drawinglayer/attribute/sdrobjectattribute3d.hxx
+++ b/include/drawinglayer/attribute/sdrobjectattribute3d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDROBJECTATTRIBUTE3D_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDROBJECTATTRIBUTE3D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 
@@ -86,7 +85,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::attribute
 
-
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDROBJECTATTRIBUTE3D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrsceneattribute3d.hxx b/include/drawinglayer/attribute/sdrsceneattribute3d.hxx
index 62aa7d6fc093..a3451a61046e 100644
--- a/include/drawinglayer/attribute/sdrsceneattribute3d.hxx
+++ b/include/drawinglayer/attribute/sdrsceneattribute3d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRSCENEATTRIBUTE3D_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRSCENEATTRIBUTE3D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 
@@ -74,7 +73,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::attribute
 
-
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRSCENEATTRIBUTE3D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/attribute/sdrshadowattribute.hxx b/include/drawinglayer/attribute/sdrshadowattribute.hxx
index ab2c045e49bb..1e2eeb7e3204 100644
--- a/include/drawinglayer/attribute/sdrshadowattribute.hxx
+++ b/include/drawinglayer/attribute/sdrshadowattribute.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRSHADOWATTRIBUTE_HXX
-#define INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRSHADOWATTRIBUTE_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <o3tl/cow_wrapper.hxx>
@@ -83,7 +82,4 @@ namespace drawinglayer::attribute
 
 } // end of namespace drawinglayer::attribute
 
-
-#endif //INCLUDED_DRAWINGLAYER_ATTRIBUTE_SDRSHADOWATTRIBUTE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/geometry/viewinformation3d.hxx b/include/drawinglayer/geometry/viewinformation3d.hxx
index ca368a6c3d3c..1b7a167fc5c9 100644
--- a/include/drawinglayer/geometry/viewinformation3d.hxx
+++ b/include/drawinglayer/geometry/viewinformation3d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_GEOMETRY_VIEWINFORMATION3D_HXX
-#define INCLUDED_DRAWINGLAYER_GEOMETRY_VIEWINFORMATION3D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 
@@ -156,7 +155,4 @@ namespace drawinglayer::geometry
 
 } // end of namespace drawinglayer::geometry
 
-
-#endif //INCLUDED_DRAWINGLAYER_GEOMETRY_VIEWINFORMATION3D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor2d/baseprocessor2d.hxx b/include/drawinglayer/processor2d/baseprocessor2d.hxx
index 1d01c60e08ff..11455e402608 100644
--- a/include/drawinglayer/processor2d/baseprocessor2d.hxx
+++ b/include/drawinglayer/processor2d/baseprocessor2d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR2D_BASEPROCESSOR2D_HXX
-#define INCLUDED_DRAWINGLAYER_PROCESSOR2D_BASEPROCESSOR2D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 
@@ -193,7 +192,4 @@ namespace drawinglayer::processor2d
 
 } // end of namespace drawinglayer::processor2d
 
-
-#endif //INCLUDED_DRAWINGLAYER_PROCESSOR2D_BASEPROCESSOR2D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor2d/contourextractor2d.hxx b/include/drawinglayer/processor2d/contourextractor2d.hxx
index 53158cc21291..00491cf5027c 100644
--- a/include/drawinglayer/processor2d/contourextractor2d.hxx
+++ b/include/drawinglayer/processor2d/contourextractor2d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR2D_CONTOUREXTRACTOR2D_HXX
-#define INCLUDED_DRAWINGLAYER_PROCESSOR2D_CONTOUREXTRACTOR2D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 
@@ -56,7 +55,4 @@ namespace drawinglayer::processor2d
 
 } // end of namespace drawinglayer::processor2d
 
-
-#endif // INCLUDED_DRAWINGLAYER_PROCESSOR2D_CONTOUREXTRACTOR2D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor2d/hittestprocessor2d.hxx b/include/drawinglayer/processor2d/hittestprocessor2d.hxx
index 5a72498f44e3..d9f335c12228 100644
--- a/include/drawinglayer/processor2d/hittestprocessor2d.hxx
+++ b/include/drawinglayer/processor2d/hittestprocessor2d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR2D_HITTESTPROCESSOR2D_HXX
-#define INCLUDED_DRAWINGLAYER_PROCESSOR2D_HITTESTPROCESSOR2D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <drawinglayer/primitive2d/Primitive2DContainer.hxx>
@@ -93,6 +92,4 @@ namespace drawinglayer::processor2d
 
 } // end of namespace drawinglayer::processor2d
 
-#endif // INCLUDED_DRAWINGLAYER_PROCESSOR2D_HITTESTPROCESSOR2D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor2d/linegeometryextractor2d.hxx b/include/drawinglayer/processor2d/linegeometryextractor2d.hxx
index a2a388dd12f3..87bb33c7b921 100644
--- a/include/drawinglayer/processor2d/linegeometryextractor2d.hxx
+++ b/include/drawinglayer/processor2d/linegeometryextractor2d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR2D_LINEGEOMETRYEXTRACTOR2D_HXX
-#define INCLUDED_DRAWINGLAYER_PROCESSOR2D_LINEGEOMETRYEXTRACTOR2D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 
@@ -55,7 +54,4 @@ namespace drawinglayer::processor2d
 
 } // end of namespace drawinglayer::processor2d
 
-
-#endif // INCLUDED_DRAWINGLAYER_PROCESSOR2D_LINEGEOMETRYEXTRACTOR2D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor2d/objectinfoextractor2d.hxx b/include/drawinglayer/processor2d/objectinfoextractor2d.hxx
index f7dc1d146885..1ab7a1f30d4b 100644
--- a/include/drawinglayer/processor2d/objectinfoextractor2d.hxx
+++ b/include/drawinglayer/processor2d/objectinfoextractor2d.hxx
@@ -16,8 +16,8 @@
  *   except in compliance with the License. You may obtain a copy of
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
-#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR2D_OBJECTINFOEXTRACTOR2D_HXX
-#define INCLUDED_DRAWINGLAYER_PROCESSOR2D_OBJECTINFOEXTRACTOR2D_HXX
+
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <drawinglayer/processor2d/baseprocessor2d.hxx>
@@ -49,6 +49,4 @@ namespace drawinglayer::processor2d
 
 } // end of namespace drawinglayer::processor2d
 
-#endif // INCLUDED_DRAWINGLAYER_PROCESSOR2D_OBJECTINFOEXTRACTOR2D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor2d/processor2dtools.hxx b/include/drawinglayer/processor2d/processor2dtools.hxx
index 91908b303805..0266a96dbbd3 100644
--- a/include/drawinglayer/processor2d/processor2dtools.hxx
+++ b/include/drawinglayer/processor2d/processor2dtools.hxx
@@ -16,8 +16,8 @@
  *   except in compliance with the License. You may obtain a copy of
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
-#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR2D_PROCESSOR2DTOOLS_HXX
-#define INCLUDED_DRAWINGLAYER_PROCESSOR2D_PROCESSOR2DTOOLS_HXX
+
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <memory>
@@ -100,6 +100,4 @@ namespace drawinglayer::processor2d
 
 } // end of namespace drawinglayer::processor2d
 
-#endif //INCLUDED_DRAWINGLAYER_PROCESSOR2D_PROCESSOR2DTOOLS_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor2d/textaspolygonextractor2d.hxx b/include/drawinglayer/processor2d/textaspolygonextractor2d.hxx
index a7189778a7f2..460daf428c1e 100644
--- a/include/drawinglayer/processor2d/textaspolygonextractor2d.hxx
+++ b/include/drawinglayer/processor2d/textaspolygonextractor2d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR2D_TEXTASPOLYGONEXTRACTOR2D_HXX
-#define INCLUDED_DRAWINGLAYER_PROCESSOR2D_TEXTASPOLYGONEXTRACTOR2D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 
@@ -90,7 +89,4 @@ namespace drawinglayer::processor2d
 
 } // end of namespace drawinglayer::processor2d
 
-
-#endif // INCLUDED_DRAWINGLAYER_PROCESSOR2D_TEXTASPOLYGONEXTRACTOR2D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor3d/baseprocessor3d.hxx b/include/drawinglayer/processor3d/baseprocessor3d.hxx
index 3832b9bbb300..0fda00b696a4 100644
--- a/include/drawinglayer/processor3d/baseprocessor3d.hxx
+++ b/include/drawinglayer/processor3d/baseprocessor3d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR3D_BASEPROCESSOR3D_HXX
-#define INCLUDED_DRAWINGLAYER_PROCESSOR3D_BASEPROCESSOR3D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 
@@ -62,7 +61,4 @@ namespace drawinglayer::processor3d
 
 } // end of namespace drawinglayer::processor3d
 
-
-#endif //_DRAWINGLAYER_PROCESSOR3D_BASEPROCESSOR3D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor3d/cutfindprocessor3d.hxx b/include/drawinglayer/processor3d/cutfindprocessor3d.hxx
index 0914a33e6132..12e6acd98327 100644
--- a/include/drawinglayer/processor3d/cutfindprocessor3d.hxx
+++ b/include/drawinglayer/processor3d/cutfindprocessor3d.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_PROCESSOR3D_CUTFINDPROCESSOR3D_HXX
-#define INCLUDED_DRAWINGLAYER_PROCESSOR3D_CUTFINDPROCESSOR3D_HXX
+#pragma once
 
 #include <drawinglayer/drawinglayerdllapi.h>
 #include <drawinglayer/processor3d/baseprocessor3d.hxx>
@@ -69,7 +68,4 @@ namespace drawinglayer::processor3d
 
 } // end of namespace drawinglayer::processor3d
 
-
-#endif //INCLUDED_DRAWINGLAYER_PROCESSOR3D_CUTFINDPROCESSOR3D_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/tools/primitive2dxmldump.hxx b/include/drawinglayer/tools/primitive2dxmldump.hxx
index 8d01633935ef..b204edf82d9a 100644
--- a/include/drawinglayer/tools/primitive2dxmldump.hxx
+++ b/include/drawinglayer/tools/primitive2dxmldump.hxx
@@ -7,8 +7,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-#ifndef INCLUDED_DRAWINGLAYER_TOOLS_PRIMITIVE2DXMLDUMP_HXX
-#define INCLUDED_DRAWINGLAYER_TOOLS_PRIMITIVE2DXMLDUMP_HXX
+#pragma once
 
 #include <sal/config.h>
 #include <drawinglayer/drawinglayerdllapi.h>
@@ -55,6 +54,4 @@ public:
 
 }
 
-#endif // INCLUDED_DRAWINGLAYER_TOOLS_PRIMITIVE2DXMLDUMP_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */