diff --git a/uppsrc/CtrlCore/CtrlCore.h b/uppsrc/CtrlCore/CtrlCore.h
index 618971164..23cd75f39 100644
--- a/uppsrc/CtrlCore/CtrlCore.h
+++ b/uppsrc/CtrlCore/CtrlCore.h
@@ -996,8 +996,8 @@ public:
 
 	virtual bool   IsShowEnabled() const;
 
-	virtual Rect   GetOpaqueRect();
-	virtual Rect   GetVoidRect();
+	virtual Rect   GetOpaqueRect() const;
+	virtual Rect   GetVoidRect() const ;
 
 	virtual void   Updated();
 
diff --git a/uppsrc/CtrlCore/CtrlDraw.cpp b/uppsrc/CtrlCore/CtrlDraw.cpp
index 9ce9bb03c..6ce63ec2e 100644
--- a/uppsrc/CtrlCore/CtrlDraw.cpp
+++ b/uppsrc/CtrlCore/CtrlDraw.cpp
@@ -217,12 +217,12 @@ void  Ctrl::SyncScroll()
 	}
 }
 
-Rect Ctrl::GetOpaqueRect()
+Rect Ctrl::GetOpaqueRect() const
 {
 	return IsTransparent() ? Rect(0, 0, 0, 0) : GetSize();
 }
 
-Rect Ctrl::GetVoidRect()
+Rect Ctrl::GetVoidRect() const
 {
 	return Rect(0, 0, 0, 0);
 }
diff --git a/uppsrc/CtrlCore/src.tpp/Ctrl$en-us.tpp b/uppsrc/CtrlCore/src.tpp/Ctrl$en-us.tpp
index 8eb112f87..b76d1685b 100644
--- a/uppsrc/CtrlCore/src.tpp/Ctrl$en-us.tpp
+++ b/uppsrc/CtrlCore/src.tpp/Ctrl$en-us.tpp
@@ -632,6 +632,21 @@ during modal dialog lifetime are displayed with enabled Ctrls.&]
 enabled.&]
 [s3;%- &]
 [s4;%- &]
+[s5;:Ctrl`:`:GetOpaqueRect`(`)const:%- [@(0.0.255) virtual] [_^Rect^ Rect]_[* GetOpaqueRect
+]()_[@(0.0.255) const]&]
+[s2; Returns the rectangle of view area that is opaque (is completely 
+filled when painting the widget). The default implementation 
+returns the whole view area if Transparent flag is set, empty 
+rectangle otherwise. Paint routine uses this information to optimize.&]
+[s3;%- &]
+[s4;%- &]
+[s5;:Ctrl`:`:GetVoidRect`(`)const:%- [@(0.0.255) virtual] [_^Rect^ Rect]_[* GetVoidRect]()_
+[@(0.0.255) const]&]
+[s2; Returns the rectangle of view area that is fully transparent 
+(nothing is painted in that rectangle). Paint routine uses this 
+information to optimize.&]
+[s3;%- &]
+[s4;%- &]
 [s5;:Ctrl`:`:OverPaint`(`)const:%- [@(0.0.255) virtual] [@(0.0.255) int]_[* OverPaint]()_[@(0.0.255) c
 onst]&]
 [s2;b17;a17; This method can returns non`-zero number that represents 
@@ -641,20 +656,6 @@ This is useful to represent some specific skinning effect (like
 glare around the button). Default implementation returns zero.&]
 [s3;%- &]
 [s4;%- &]
-[s5;:Ctrl`:`:GetOpaqueRect`(`):%- [@(0.0.255) virtual] [_^`:`:Rect^ Rect]_[* GetOpaqueRect](
-)&]
-[s2;b17;a17; Returns the rectangle of view area that is opaque (is 
-completely filled when painting the widget). The default implementation 
-returns the whole view area if Transparent flag is set, empty 
-rectangle otherwise. Paint routine uses this information to optimize.&]
-[s3;%- &]
-[s4;%- &]
-[s5;:Ctrl`:`:GetVoidRect`(`):%- [@(0.0.255) virtual] [_^`:`:Rect^ Rect]_[* GetVoidRect]()&]
-[s2;b17;a17; Returns the rectangle of view area that is fully transparent 
-(nothing is painted in that rectangle). Paint routine uses this 
-information to optimize.&]
-[s3;%- &]
-[s4;%- &]
 [s5;:Ctrl`:`:Close`(`):%- [@(0.0.255) virtual] [@(0.0.255) void]_[* Close]()&]
 [s2;b17;a17; Closes top`-level Ctrl. If Ctrl is not top`-level, has 
 no effect. If it is and is open in host GUI (either as pop`-up 
diff --git a/uppsrc/CtrlLib/Static.cpp b/uppsrc/CtrlLib/Static.cpp
index 166a15357..ee63b6842 100644
--- a/uppsrc/CtrlLib/Static.cpp
+++ b/uppsrc/CtrlLib/Static.cpp
@@ -95,7 +95,7 @@ void  LabelBox::AssignAccessKeys(dword used)
 
 LabelBox::~LabelBox() {}
 
-Rect LabelBox::GetVoidRect()
+Rect LabelBox::GetVoidRect() const
 {
 	Rect r = GetSize();
 	r.left += 2;
@@ -180,7 +180,7 @@ void LabelBox::Paint(Draw& w)
 	w.End();
 }
 
-Rect ParentCtrl::GetVoidRect()
+Rect ParentCtrl::GetVoidRect() const
 {
 	return GetSize();
 }
diff --git a/uppsrc/CtrlLib/StaticCtrl.h b/uppsrc/CtrlLib/StaticCtrl.h
index afdd98e83..6005bdc84 100644
--- a/uppsrc/CtrlLib/StaticCtrl.h
+++ b/uppsrc/CtrlLib/StaticCtrl.h
@@ -39,7 +39,7 @@ class LabelBox : public Label {
 public:
 	virtual void   Paint(Draw& w);
 	virtual void   AssignAccessKeys(dword used);
-	virtual Rect   GetVoidRect();
+	virtual Rect   GetVoidRect() const;
 
 public:
 	LabelBox();
@@ -57,7 +57,7 @@ class ParentCtrl : public Ctrl {
 	Size minsize;
 
 public:
-	virtual Rect   GetVoidRect();
+	virtual Rect   GetVoidRect() const;
 	virtual Size   GetStdSize() const;
 	virtual Size   GetMinSize() const;
 
diff --git a/uppsrc/CtrlLib/TabCtrl.cpp b/uppsrc/CtrlLib/TabCtrl.cpp
index 7e79bcf96..d555865b6 100644
--- a/uppsrc/CtrlLib/TabCtrl.cpp
+++ b/uppsrc/CtrlLib/TabCtrl.cpp
@@ -162,7 +162,7 @@ void TabCtrl::Tabs::Paint(Draw& w)
 	static_cast<TabCtrl *>(GetParent())->PaintTabs(w);
 }
 
-Rect TabCtrl::GetOpaqueRect()
+Rect TabCtrl::GetOpaqueRect() const
 {
 	return pane.GetRect();
 }
diff --git a/uppsrc/CtrlLib/TabCtrl.h b/uppsrc/CtrlLib/TabCtrl.h
index 47bf9f09c..429506b28 100644
--- a/uppsrc/CtrlLib/TabCtrl.h
+++ b/uppsrc/CtrlLib/TabCtrl.h
@@ -9,7 +9,7 @@ public:
 	virtual bool  Key(dword key, int count);
 	virtual bool  HotKey(dword key);
 	virtual void  Layout();
-	virtual Rect  GetOpaqueRect();
+	virtual Rect  GetOpaqueRect() const;
 	virtual Value GetData() const;
 	virtual void  SetData(const Value& data);