diff -Naur sd/inc/drawdoc.hxx sd_new/inc/drawdoc.hxx
--- sd/inc/drawdoc.hxx	2009-09-16 22:55:36.305490000 +0800
+++ sd_new/inc/drawdoc.hxx	2010-02-08 20:43:02.679969000 +0800
@@ -371,7 +371,8 @@
                         
 	const sd::PresentationSettings& getPresentationSettings() const { return maPresentationSettings; }
 	sd::PresentationSettings& getPresentationSettings() { return maPresentationSettings; }
-                                            
+        BOOL			IsCustomShow(){ return maPresentationSettings.mbCustomShow;}//add by yujinliang
+	BOOL			IsCanStartCustomShow();//add by yujinliang                                    
 	const ::com::sun::star::uno::Reference< ::com::sun::star::presentation::XPresentation2 >& getPresentation() const;
 
    	void                SetSummationOfParagraphs( BOOL bOn = TRUE ) { mbSummationOfParagraphs = bOn; }
diff -Naur sd/source/core/drawdoc.cxx sd_new/source/core/drawdoc.cxx
--- sd/source/core/drawdoc.cxx	2009-09-17 20:26:03.415253000 +0800
+++ sd_new/source/core/drawdoc.cxx	2010-02-08 21:13:18.331970000 +0800
@@ -382,7 +382,34 @@
 
 
 }
+//add by yujinliang
+BOOL	SdDrawDocument::IsCanStartCustomShow()
+{
+	if( !IsCustomShow() ) return FALSE;
+	SdCustomShow* pCustomShow = NULL;
+	List* pCustomShowList = GetCustomShowList();
+	BOOL  bAllPagesHidden = TRUE;
+	if ( pCustomShowList )
+	{
+		pCustomShow = (SdCustomShow*)pCustomShowList->GetCurObject();
+		void* pCustomSlide = NULL;
+		if( pCustomShow )
+		{
+			for( pCustomSlide = pCustomShow->First(); pCustomSlide; pCustomSlide = pCustomShow->Next())
+			{
+				if( !( ((SdPage*)pCustomSlide)->IsExcluded() ))
+				{
+					bAllPagesHidden = FALSE;
+					break;
+				}
+			}
+		}
+
+	}
 
+	return !bAllPagesHidden;
+
+}
 /*************************************************************************
 |*
 |* Destruktor
diff -Naur sd/source/ui/slidesorter/controller/SlsSlotManager.cxx sd_new/source/ui/slidesorter/controller/SlsSlotManager.cxx
--- sd/source/ui/slidesorter/controller/SlsSlotManager.cxx	2009-09-18 19:15:03.661735000 +0800
+++ sd_new/source/ui/slidesorter/controller/SlsSlotManager.cxx	2010-02-08 20:43:59.443099000 +0800
@@ -635,7 +635,7 @@
 	if( SFX_ITEM_AVAILABLE == rSet.GetItemState( SID_PRESENTATION ) ||
 		SFX_ITEM_AVAILABLE == rSet.GetItemState( SID_REHEARSE_TIMINGS ) )
 	{
-        BOOL bDisable = TRUE;
+        BOOL bDisable = FALSE;
         model::PageEnumeration aAllPages (
             model::PageEnumerationProvider::CreateAllPagesEnumeration(mrSlideSorter.GetModel()));
         while (aAllPages.HasMoreElements())
@@ -645,6 +645,9 @@
             if( !pPage->IsExcluded() )
                 bDisable = FALSE;
 		}
+		//add by yujinliang
+		SdDrawDocument* pSdDoc =  mrSlideSorter.GetModel().GetDocument();
+		if( pSdDoc && pSdDoc->IsCustomShow() && !pSdDoc->IsCanStartCustomShow() ) bDisable = TRUE;
 		if( bDisable || pDocShell->IsPreview())
 		{
 			rSet.DisableItem( SID_PRESENTATION );
diff -Naur sd/source/ui/view/drviews7.cxx sd_new/source/ui/view/drviews7.cxx
--- sd/source/ui/view/drviews7.cxx	2009-09-18 19:15:03.661735000 +0800
+++ sd_new/source/ui/view/drviews7.cxx	2010-02-08 20:43:02.684469000 +0800
@@ -371,7 +371,8 @@
             if( !pPage->IsExcluded() )
 				bDisable = FALSE;
         }
-
+	//add by yujinliang
+	if( GetDoc()->IsCustomShow() && !GetDoc()->IsCanStartCustomShow() ) bDisable = TRUE;
         if( bDisable || GetDocSh()->IsPreview())
 		{
             rSet.DisableItem( SID_PRESENTATION );
diff -Naur sd/source/ui/view/outlnvsh.cxx sd_new/source/ui/view/outlnvsh.cxx
--- sd/source/ui/view/outlnvsh.cxx	2009-09-18 19:15:03.661735000 +0800
+++ sd_new/source/ui/view/outlnvsh.cxx	2010-02-08 20:43:02.684469000 +0800
@@ -1120,6 +1120,8 @@
 			if( !pPage->IsExcluded() )
 				bDisable = FALSE;
 		}
+		//add by yujinliang
+		if( GetDoc()->IsCustomShow() && !GetDoc()->IsCanStartCustomShow() ) bDisable = TRUE;
 		if( bDisable || GetDocSh()->IsPreview())
 		{
 			rSet.DisableItem( SID_PRESENTATION );