diff --git a/ASCOfficeDocFile/DocDocxConverter/FormattedDiskPageCHPX.cpp b/ASCOfficeDocFile/DocDocxConverter/FormattedDiskPageCHPX.cpp
index ec1cf63ddc6..6666667e6a6 100644
--- a/ASCOfficeDocFile/DocDocxConverter/FormattedDiskPageCHPX.cpp
+++ b/ASCOfficeDocFile/DocDocxConverter/FormattedDiskPageCHPX.cpp
@@ -53,7 +53,7 @@ namespace DocFileFormat
 	/*========================================================================================================*/
 
 	FormattedDiskPageCHPX::FormattedDiskPageCHPX( POLE::Stream* wordStream, int offset, int nWordVersion ):
-																FormattedDiskPage(), rgb(NULL), grpchpxSize(NULL), grpchpx(NULL) 
+																FormattedDiskPage(), rgb(NULL), grpchpxSize(0), grpchpx(NULL) 
 	{
 		Type = Character;
 		WordStream = wordStream;
diff --git a/ASCOfficeDocxFile2/DocWrapper/ChartWriter.cpp b/ASCOfficeDocxFile2/DocWrapper/ChartWriter.cpp
index 34af4c4d0ea..faada2d1c52 100644
--- a/ASCOfficeDocxFile2/DocWrapper/ChartWriter.cpp
+++ b/ASCOfficeDocxFile2/DocWrapper/ChartWriter.cpp
@@ -599,7 +599,7 @@ namespace BinXlsxRW{
 						//как в CsvReader - подозрительный код
 						WCHAR *pEndPtr;
 						wcstod(val.c_str(), &pEndPtr);
-						if (NULL != *pEndPtr)
+						if (0 != *pEndPtr)
 						{
 							// Не число
 							aSharedStrings.push_back(val);
diff --git a/ASCOfficePPTFile/PPTFormatLib/Reader/PPTFileReader.cpp b/ASCOfficePPTFile/PPTFormatLib/Reader/PPTFileReader.cpp
index 04f65848a44..e8442c9a0aa 100644
--- a/ASCOfficePPTFile/PPTFormatLib/Reader/PPTFileReader.cpp
+++ b/ASCOfficePPTFile/PPTFormatLib/Reader/PPTFileReader.cpp
@@ -53,7 +53,7 @@ CPPTFileReader::CPPTFileReader(POLE::Storage *pStorage, std::wstring strTemp):
 	   m_pStorage(pStorage),  
        m_bIsPPTFile(false),
 	   m_nPresentationCodePage(1250),
-	   m_pDocumentStream(NULL),  m_pPictureStream(NULL),	m_pDocumentSummaryStream(NULL), m_pEncryptedSummaryStream(NULL),
+	   m_pDocumentStream(),  m_pPictureStream(), m_pDocumentSummaryStream(), m_pEncryptedSummaryStream(),
 	   m_strTmpDirectory(strTemp),
 	   m_oDocumentInfo()
 { 
diff --git a/ASCOfficePPTXFile/Editor/Drawing/Shapes/BaseShape/BaseShape.cpp b/ASCOfficePPTXFile/Editor/Drawing/Shapes/BaseShape/BaseShape.cpp
index 865cb640870..9179fd3cfa0 100644
--- a/ASCOfficePPTXFile/Editor/Drawing/Shapes/BaseShape/BaseShape.cpp
+++ b/ASCOfficePPTXFile/Editor/Drawing/Shapes/BaseShape/BaseShape.cpp
@@ -50,7 +50,7 @@ CBaseShapePtr CBaseShape::CreateByType(NSBaseShape::ClassType ClassType, int Sha
 		return CPPTShape::CreateByType((PPTShapes::ShapeType)ShapeType);
 	}
 
-	return NULL;
+	return CBaseShapePtr();
 }
 
 bool CBaseShape::SetType(NSBaseShape::ClassType ClassType, int ShapeType)
diff --git a/ASCOfficePPTXFile/PPTXFormat/Logic/SmartArt.cpp b/ASCOfficePPTXFile/PPTXFormat/Logic/SmartArt.cpp
index 1bab9e66208..32ea589c7cf 100644
--- a/ASCOfficePPTXFile/PPTXFormat/Logic/SmartArt.cpp
+++ b/ASCOfficePPTXFile/PPTXFormat/Logic/SmartArt.cpp
@@ -194,7 +194,7 @@ namespace PPTX
 		}
 		std::wstring ChartRec::toXML() const
 		{
-			if (!id_data.is_init() || NULL == m_bData)
+			if (!id_data.is_init() || false == m_bData)
 				return L"";
             std::wstring strData = L"<c:chart xmlns:c=\"http://schemas.openxmlformats.org/drawingml/2006/chart\" \
 xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\" r:id=\"" + id_data->ToString() + L"\"/>";
@@ -203,7 +203,7 @@ xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\"
 		}
 		void ChartRec::toXmlWriter(NSBinPptxRW::CXmlWriter* pWriter) const
 		{
-			if (!id_data.is_init() || NULL == m_bData)
+			if (!id_data.is_init() || false == m_bData)
 				return;
 			
             std::wstring strData = L"<c:chart xmlns:c=\"http://schemas.openxmlformats.org/drawingml/2006/chart\" \
diff --git a/ASCOfficeRtfFile/RtfFormatLib/source/RtfProperty.h b/ASCOfficeRtfFile/RtfFormatLib/source/RtfProperty.h
index 90452092fa3..9c9f042f3a0 100644
--- a/ASCOfficeRtfFile/RtfFormatLib/source/RtfProperty.h
+++ b/ASCOfficeRtfFile/RtfFormatLib/source/RtfProperty.h
@@ -1135,7 +1135,7 @@ class RtfCharProperty: public IRenderableProperty
 		m_poShading.SetDefault();
 		m_poBorder.SetDefault();
 
-		m_pOldCharProp = RtfCharPropertyPtr(NULL);
+		m_pOldCharProp = RtfCharPropertyPtr();
 	}
 	void Merge( RtfCharProperty& oCharPr )
 	{
@@ -2522,7 +2522,7 @@ class RtfRowProperty: public RtfTableProperty, public ItemContainer< RtfCellProp
 		DEFAULT_PROPERTY( m_nTrAuth)
 		DEFAULT_PROPERTY( m_nTrDate)
 
-		m_pOldRowProperty = RtfRowPropertyPtr(NULL);
+		m_pOldRowProperty = RtfRowPropertyPtr();
 	}
 	bool IsValid()
 	{
@@ -2789,7 +2789,7 @@ class RtfParagraphProperty: public IRenderableProperty
 
 		m_bHidden			= false;
 		m_bOldList			= false;
-		m_pOldParagraphProp = RtfParagraphPropertyPtr(NULL);
+		m_pOldParagraphProp = RtfParagraphPropertyPtr();
 	}
 	void Merge( RtfParagraphProperty& oParPr )
 	{
diff --git a/ASCOfficeRtfFile/RtfFormatLib/source/RtfSection.h b/ASCOfficeRtfFile/RtfFormatLib/source/RtfSection.h
index af3ba4a83b4..197c654b492 100644
--- a/ASCOfficeRtfFile/RtfFormatLib/source/RtfSection.h
+++ b/ASCOfficeRtfFile/RtfFormatLib/source/RtfSection.h
@@ -643,7 +643,7 @@ class RtfSectionProperty: public IRenderableProperty
 		DEFAULT_PROPERTY( m_nSrAuth)
 		DEFAULT_PROPERTY( m_nSrDate)
 
-		m_pOldSectionProp = RtfSectionPropertyPtr(NULL);
+		m_pOldSectionProp = RtfSectionPropertyPtr();
 	}
     std::wstring RenderToRtf(RenderParameter oRenderParameter);
     std::wstring RenderToOOX(RenderParameter oRenderParameter);
diff --git a/ASCOfficeXlsFile2/source/XlsFormat/Logic/Biff_structures/SerAr.cpp b/ASCOfficeXlsFile2/source/XlsFormat/Logic/Biff_structures/SerAr.cpp
index 8558832ff58..00af9fa68c0 100644
--- a/ASCOfficeXlsFile2/source/XlsFormat/Logic/Biff_structures/SerAr.cpp
+++ b/ASCOfficeXlsFile2/source/XlsFormat/Logic/Biff_structures/SerAr.cpp
@@ -63,11 +63,10 @@ SerArPtr SerAr::createSerAr(const unsigned char type)
 		return SerArPtr(new SerStr);
 		break;
 	default:
-		// EXCEPT::RT::WrongBiffRecord("Unsupported type of SerAr.", "SerAr container");
 		break;
 	}
     
-    return NULL; // TODO: need fixed
+    return SerArPtr(); 
 }
 
 
diff --git a/ASCOfficeXlsFile2/source/XlsFormat/Logic/Biff_unions/CHARTFOMATS.cpp b/ASCOfficeXlsFile2/source/XlsFormat/Logic/Biff_unions/CHARTFOMATS.cpp
index 6c4596a8db9..0997b8f1c77 100644
--- a/ASCOfficeXlsFile2/source/XlsFormat/Logic/Biff_unions/CHARTFOMATS.cpp
+++ b/ASCOfficeXlsFile2/source/XlsFormat/Logic/Biff_unions/CHARTFOMATS.cpp
@@ -258,7 +258,7 @@ const bool CHARTFORMATS::loadContent(BinProcessor& proc)
 			if (cf.dataLabExt) 
 			{
 				m_arChartFormats.push_back(cf);
-				cf.attachedLABEL = NULL;
+				cf.attachedLABEL = XLS::BaseObjectPtr();
 			}
 			cf.dataLabExt = elements_.front();
 		}
@@ -267,7 +267,7 @@ const bool CHARTFORMATS::loadContent(BinProcessor& proc)
 			if (cf.attachedLABEL)
 			{
 				m_arChartFormats.push_back(cf);
-				cf.dataLabExt = NULL;
+				cf.dataLabExt = XLS::BaseObjectPtr();
 			}
 			cf.attachedLABEL = elements_.front();
 		}
diff --git a/DesktopEditor/cximage/CxImage/ximaenc.cpp b/DesktopEditor/cximage/CxImage/ximaenc.cpp
index 6050d5ad125..e74a1a6d727 100644
--- a/DesktopEditor/cximage/CxImage/ximaenc.cpp
+++ b/DesktopEditor/cximage/CxImage/ximaenc.cpp
@@ -1147,7 +1147,7 @@ bool CxImage::CheckFormat(CxFile * hFile, uint32_t imagetype)
 ////////////////////////////////////////////////////////////////////////////////
 bool CxImage::CheckFormat(uint8_t * buffer, uint32_t size, uint32_t imagetype)
 {
-	if (buffer==NULL || size==NULL){
+    if (buffer==NULL || size==0){
 		strcpy(info.szLastError,"invalid or empty buffer");
 		return false;
 	}
diff --git a/PdfReader/Src/GState.h b/PdfReader/Src/GState.h
index 04bc19cc6ac..124f64a14bd 100644
--- a/PdfReader/Src/GState.h
+++ b/PdfReader/Src/GState.h
@@ -1806,7 +1806,7 @@ namespace PdfReader
 		int     GetFlag(int nPathIndex)
 		{
 			if (nPathIndex < 0 || nPathIndex >= m_nPathsCount)
-				return NULL;
+				return 0;
 
 			return m_pFlags[nPathIndex];
 		}
diff --git a/XlsxSerializerCom/Reader/CSVReader.cpp b/XlsxSerializerCom/Reader/CSVReader.cpp
index 6bb5fab0893..96425598607 100644
--- a/XlsxSerializerCom/Reader/CSVReader.cpp
+++ b/XlsxSerializerCom/Reader/CSVReader.cpp
@@ -199,7 +199,7 @@ namespace CSVReader
 
 		WCHAR *pEndPtr;
         double dValue = wcstod(sText.c_str(), &pEndPtr);
-		if (NULL != *pEndPtr)
+		if (0 != *pEndPtr)
 		{
 			// Не число
 			pCell->m_oType->SetValue(SimpleTypes::Spreadsheet::celltypeInlineStr);