diff --git a/funcext/tvclib/utslvclpage.tsf b/funcext/tvclib/utslvclpage.tsf
index 3cfad61..0f5ce3f 100644
--- a/funcext/tvclib/utslvclpage.tsf
+++ b/funcext/tvclib/utslvclpage.tsf
@@ -10,7 +10,7 @@ type tcustomtabitem = class() //TTCITEMA
     FCaption;
     FVisible;
     FPageSheet;
-    function SetVisible(v);
+    function SetVisible(v);//设置可见
     begin
         nv := v?true:false;
         if nv<>FVisible then 
@@ -18,7 +18,7 @@ type tcustomtabitem = class() //TTCITEMA
             FVisible := v;
         end 
     end 
-    function SetCaption(s);
+    function SetCaption(s);//设置标签
     begin
         if ifstring(s) and s<>FCaption then 
         begin
@@ -28,14 +28,14 @@ type tcustomtabitem = class() //TTCITEMA
         end 
     end         
     public
-    function Create();
+    function Create();//构造
     begin
         FVisible:= true;
     end 
     property Caption read FCaption write SetCaption;
     property PageSheet read FPageSheet Write FPageSheet;
 end 
-type tcustomtabsheet = class(TCustomControl)
+type tcustomtabsheet = class(TCustomControl) //控件页面
     {**
     @explan(说明)page控件页面 %%
     **}
@@ -51,7 +51,7 @@ type tcustomtabsheet = class(TCustomControl)
             Parent.SetTabText(id,s);
         end 
     end 
-    function SetParent(p);override;
+    function SetParent(p);override; //设置父窗口
     begin
         if (P is class(tcustompagecontrol) ) and parent<>p then 
         begin
@@ -61,7 +61,7 @@ type tcustomtabsheet = class(TCustomControl)
                 oldparent.RemovePage(self);
             end 
             inherited;
-            parent.addtabitem(self);            
+            parent.addtabitem(self(true));            
         end else 
         if not(p is class(TWincontrol)) then 
         begin
@@ -74,15 +74,15 @@ type tcustomtabsheet = class(TCustomControl)
         end 
     end 
     public 
-    function paint();override;
+    function paint();override; //设计器模式下绘制网格
     begin
         drawdesigninggrid();
     end 
-    function DesigningMove();override;
+    function DesigningMove();override;//移动
     begin
         return false;
     end 
-    function DesigningSizer();override;
+    function DesigningSizer();override;//调整大小
     begin
         return false;
     end 
@@ -91,7 +91,6 @@ type tcustomtabsheet = class(TCustomControl)
         inherited;
         Caption := "tab";
         Visible := false;
-        FTabVisible := True;   
     end 
     function CreateParams(p);override;
     begin
@@ -101,13 +100,12 @@ type tcustomtabsheet = class(TCustomControl)
 end 
 type tcustompagecontrol = class(TCustomControl)
     private 
-    FirstViewIndex;
+    FirstViewIndex; //第一个展示的序号
     FCurrentid;
     FPrevid;
-    FTabItems; //
-    
+    FTabItems; //    
     FOnSelChange;
-    FOnSelChanging;
+    FOnSelChanging; //正在改变
     //FOnrclick;
     FTabPosition;
     FTabHeight;
@@ -298,15 +296,21 @@ type tcustompagecontrol = class(TCustomControl)
         if FCurrentid= id then return ;
         if id>=0 and id<FTabItems.length() then 
         begin
+            if OnSelChanging then 
+            begin 
+                e := new tuieventbase(0,FPrevid,FCurrentid,0); //m,w,l,h
+                doonSelChanging(self(true),e);
+                if e.skip then return ;
+            end    
             FPrevid := FCurrentid;
             FCurrentid := id; 
             InsureIdxVisible(id);          
             InvalidateRect(nil,false);
-            DoControlAlign();
-            if OnSelChanging then 
-                doonSelChanging(self(true),new tuieventbase(0,0,0,0));
+            DoControlAlign();            
             if OnSelChange then 
-                doonSelChange(self(true),new tuieventbase(0,0,0,0));
+            begin
+                doonSelChange(self(true),new tuieventbase(0,FPrevid,FCurrentid,0));
+            end
         end else 
         if FTabItems.length()=0 then 
         begin
@@ -422,8 +426,7 @@ type tcustompagecontrol = class(TCustomControl)
         FPrevid := -1;
         FTabItems := new tnumindexarray();       
     end 
-
-    Function SetCurSel(id);
+    Function SetCurSel(id); //设置当前序号
     begin
         if id is class(tcustomtabsheet) then 
         begin
@@ -434,25 +437,24 @@ type tcustompagecontrol = class(TCustomControl)
             iid := integer(id);
             setselidx(iid);
         end 
-    end 
-
-    
+    end     
     function paint();override; //绘制
     begin
         PaintTabs();
         PaintScroll();   
     end 
-    function MouseUp(o,e);override;
+    function MouseUp(o,e);override;//鼠标弹起
     begin
         ps := e.pos();
-        if e.button()=mbRight then return ;
-        if FScrollBtnRect and  pointinrect(ps,fnextrect) then 
+        mb := e.button();
+        //if mb=mbRight then return ;
+        if (mb=mbLeft) and FScrollBtnRect and  pointinrect(ps,fnextrect) then 
         begin
             if e.Button() = mbLeft then 
                 ScrollNext();
             return ;
         end else 
-        if FScrollBtnRect and pointinrect(ps,Fprevrect) then 
+        if (mb=mbLeft) and FScrollBtnRect and pointinrect(ps,Fprevrect) then 
         begin
             if e.Button() = mbLeft then 
                 scrollprev();
@@ -465,17 +467,16 @@ type tcustompagecontrol = class(TCustomControl)
             if v and pointinrect(ps,v) then 
             begin
                 setselidx(i);
-                if e.Button() = mbLeft then 
-                begin 
-                    
+                if Onclick and (mb = mbLeft) then 
+                begin                     
                     CallMessgeFunction(Onclick,o,e);
                 end else 
-                if e.Button() = mbRight then
+                if onrclick and (mb = mbRight) then
                 begin
                     CallMessgeFunction(onrclick,o,e);
                 end  
             end 
-            e.skip := true;
+            //
         end 
     end 
     function doonSelChange(o,e);virtual;
@@ -492,18 +493,18 @@ type tcustompagecontrol = class(TCustomControl)
         if r then return r;
         return array(0,0,0,0);
     end 
-    function GetTabText(AIndex);
+    function GetTabText(AIndex);//获得caption
     begin
         r := "";
         if AIndex<FTabItems.Count and AIndex>0 then return FTabItems[AIndex].Caption;
         return r;
     end 
-    function IsContainer(cd);override;
+    function IsContainer(cd);override;//是否容纳
     begin
         if cd is class(tcustomtabsheet) then return true;
         return false;
     end 
-    function GetPageID(page);
+    function GetPageID(page);//获得page序号
     begin
         {**
         @explan(说明)获取page的序号 %%
@@ -521,7 +522,7 @@ type tcustompagecontrol = class(TCustomControl)
         end 
         return r;
     end 
-    function DoControlAlign();override;
+    function DoControlAlign();override;//调整位置
     begin
         CalcTabs();        
         for i := 0 to FTabItems.length()-1 do 
@@ -548,7 +549,7 @@ type tcustompagecontrol = class(TCustomControl)
             end 
         end 		
     end 
-    function RemovePageTab(id);
+    function RemovePageTab(id);//移除sheet
     begin
         if not(id>=0) then return ;
          FTabItems.splice(id,1);
@@ -570,7 +571,7 @@ type tcustompagecontrol = class(TCustomControl)
          CalcTabs();
          InvalidateRect(nil,false);                    
     end 
-    function RemovePage(i);
+    function RemovePage(i);//移除sheet
     begin
         {**
         @explan(说明)移除page %%
@@ -635,8 +636,7 @@ type tcustompagecontrol = class(TCustomControl)
     function InitializeWnd();override;
     begin
         inherited;
-    end 	
-    
+    end 	    
     function AppendPage(page);
     begin
         {**
diff --git a/funcext/tvclib/utslvclstdctl.tsf b/funcext/tvclib/utslvclstdctl.tsf
index e3059d5..15b8298 100644
--- a/funcext/tvclib/utslvclstdctl.tsf
+++ b/funcext/tvclib/utslvclstdctl.tsf
@@ -4048,10 +4048,12 @@ type TcustomComboBox=class(TCustomComboBoxbase)
         end
         FEdit.onchange := function(o,e);
         begin
+            if feditischanging then return feditischanging := false;
             if not(o.Readonly) then
             begin
                 feditischanging := true;
-                CallMessgeFunction(Foneditchanged,o,e);                
+                if Foneditchanged then 
+                    CallMessgeFunction(Foneditchanged,o,e);                
                 if FMultisel then return feditischanging:=false;
                 t := o.Text;
                 if t = getCurrentItemText() then return ;                
@@ -4083,7 +4085,9 @@ type TcustomComboBox=class(TCustomComboBoxbase)
         begin
             if feditischanging then return ;
             r := getCurrentItemText(); 
-            FEdit.Text := r;               
+            feditischanging := true;
+            FEdit.Text := r;   
+            feditischanging := false;            
             ShowDropDown(false);
             CallMessgeFunction(OnSelchanged,self(true),e);
         end