diff --git a/components/fpspreadsheet/examples/excel8demo/excel8write.lpi b/components/fpspreadsheet/examples/excel8demo/excel8write.lpi
index a8b6f793b..6ab082e31 100644
--- a/components/fpspreadsheet/examples/excel8demo/excel8write.lpi
+++ b/components/fpspreadsheet/examples/excel8demo/excel8write.lpi
@@ -1,8 +1,8 @@
 <?xml version="1.0"?>
 <CONFIG>
   <ProjectOptions>
+    <Version Value="9"/>
     <PathDelim Value="\"/>
-    <Version Value="7"/>
     <General>
       <Flags>
         <AlwaysBuild Value="False"/>
@@ -10,13 +10,15 @@
       </Flags>
       <SessionStorage Value="InProjectDir"/>
       <MainUnit Value="0"/>
-      <TargetFileExt Value=".exe"/>
       <Title Value="excel8write"/>
       <UseAppBundle Value="False"/>
     </General>
     <VersionInfo>
-      <StringTable Comments="" CompanyName="" FileDescription="" FileVersion="0.0.0.0" InternalName="" LegalCopyright="" LegalTrademarks="" OriginalFilename="" ProductName="" ProductVersion=""/>
+      <StringTable ProductVersion=""/>
     </VersionInfo>
+    <BuildModes Count="1">
+      <Item1 Name="default" Default="True"/>
+    </BuildModes>
     <PublishOptions>
       <Version Value="2"/>
       <IgnoreBinaries Value="False"/>
@@ -43,12 +45,17 @@
     </Units>
   </ProjectOptions>
   <CompilerOptions>
-    <Version Value="8"/>
+    <Version Value="9"/>
     <PathDelim Value="\"/>
     <SearchPaths>
-      <OtherUnitFiles Value="..\"/>
-      <SrcPath Value="..\"/>
+      <OtherUnitFiles Value=".."/>
+      <SrcPath Value=".."/>
     </SearchPaths>
+    <Parsing>
+      <SyntaxOptions>
+        <UseAnsiStrings Value="False"/>
+      </SyntaxOptions>
+    </Parsing>
     <Other>
       <CompilerPath Value="$(CompPath)"/>
     </Other>
diff --git a/components/fpspreadsheet/examples/excel8demo/excel8write.lpr b/components/fpspreadsheet/examples/excel8demo/excel8write.lpr
index c0bb8a39a..30a18bfb6 100644
--- a/components/fpspreadsheet/examples/excel8demo/excel8write.lpr
+++ b/components/fpspreadsheet/examples/excel8demo/excel8write.lpr
@@ -82,6 +82,7 @@ begin
   MyWorksheet.WriteUTF8Text(0, 2, Str_Third);
   MyWorksheet.WriteUTF8Text(0, 3, Str_Fourth);
   MyWorksheet.WriteTextRotation(0, 0, rt90DegreeClockwiseRotation);
+  MyWorksheet.WriteUsedFormatting(0, 1, [uffBold]);
 
   // Save the spreadsheet to a file
   MyWorkbook.WriteToFile(MyDir + 'test2.xls', sfExcel8, False);
diff --git a/components/fpspreadsheet/examples/excel8demo/run_excel8write.bat b/components/fpspreadsheet/examples/excel8demo/run_excel8write.bat
new file mode 100644
index 000000000..5d6acfa5f
--- /dev/null
+++ b/components/fpspreadsheet/examples/excel8demo/run_excel8write.bat
@@ -0,0 +1,2 @@
+excel8write.exe
+pause
\ No newline at end of file
diff --git a/components/fpspreadsheet/fpspreadsheet.pas b/components/fpspreadsheet/fpspreadsheet.pas
index 71c97bb88..b10ee9d04 100755
--- a/components/fpspreadsheet/fpspreadsheet.pas
+++ b/components/fpspreadsheet/fpspreadsheet.pas
@@ -88,7 +88,7 @@ type
 
   {@@ List of possible formatting fields }
 
-  TsUsedFormattingField = (uffTextRotation);
+  TsUsedFormattingField = (uffTextRotation, uffBold);
 
   {@@ Describes which formatting fields are active }
 
@@ -157,6 +157,7 @@ type
     procedure WriteFormula(ARow, ACol: Cardinal; AFormula: TsFormula);
     procedure WriteRPNFormula(ARow, ACol: Cardinal; AFormula: TsRPNFormula);
     procedure WriteTextRotation(ARow, ACol: Cardinal; ARotation: TsTextRotation);
+    procedure WriteUsedFormatting(ARow, ACol: Cardinal; AUsedFormatting: TsUsedFormattingFields);
     property  Cells: TAVLTree read FCells;
   end;
 
@@ -657,6 +658,16 @@ begin
   ACell^.TextRotation := ARotation;
 end;
 
+procedure TsWorksheet.WriteUsedFormatting(ARow, ACol: Cardinal;
+  AUsedFormatting: TsUsedFormattingFields);
+var
+  ACell: PCell;
+begin
+  ACell := GetCell(ARow, ACol);
+
+  ACell^.UsedFormattingFields := AUsedFormatting;
+end;
+
 { TsWorkbook }
 
 {@@
diff --git a/components/fpspreadsheet/xlsbiff8.pas b/components/fpspreadsheet/xlsbiff8.pas
index e49dd3045..11816a85c 100755
--- a/components/fpspreadsheet/xlsbiff8.pas
+++ b/components/fpspreadsheet/xlsbiff8.pas
@@ -168,6 +168,7 @@ const
 
   { FONT record constants }
   INT_FONT_WEIGHT_NORMAL  = $0190;
+  INT_FONT_WEIGHT_BOLD    = $02BC;
 
   { FORMULA record constants }
   MASK_FORMULA_RECALCULATE_ALWAYS  = $0001;
@@ -306,10 +307,12 @@ begin
   try
     FontData.Name := 'Arial';
 
-    // FONT0
+    // FONT0 - normal
     WriteFont(AStream, FontData);
-    // FONT1
+    // FONT1 - bold
+    FontData.Bold := True;
     WriteFont(AStream, FontData);
+    FontData.Bold := False;
     // FONT2
     WriteFont(AStream, FontData);
     // FONT3
@@ -356,6 +359,8 @@ begin
   WriteXF(AStream, 0, 0, XF_ROTATION_90_DEGREE_COUNTERCLOCKWISE);
   // XF17
   WriteXF(AStream, 0, 0, XF_ROTATION_90_DEGREE_CLOCKWISE);
+  // XF18
+  WriteXF(AStream, 1, 0, XF_ROTATION_HORIZONTAL);
 
   WriteStyle(AStream);
 
@@ -546,13 +551,15 @@ begin
   AStream.WriteWord(WordToLE(200));
 
   { Option flags }
-  AStream.WriteWord(WordToLE(0));
+  if AFont.Bold then AStream.WriteWord(WordToLE(1))
+  else AStream.WriteWord(WordToLE(0));
 
   { Colour index }
   AStream.WriteWord(WordToLE($7FFF));
 
   { Font weight }
-  AStream.WriteWord(WordToLE(INT_FONT_WEIGHT_NORMAL));
+  if AFont.Bold then AStream.WriteWord(WordToLE(INT_FONT_WEIGHT_BOLD))
+  else AStream.WriteWord(WordToLE(INT_FONT_WEIGHT_NORMAL));
 
   { Escapement type }
   AStream.WriteWord(WordToLE(0));
@@ -742,6 +749,10 @@ begin
       AStream.WriteWord(WordToLE(15));
     end;
   end
+  else if ACell^.UsedFormattingFields = [uffBold] then
+  begin
+    AStream.WriteWord(WordToLE(18));
+  end
   else
     AStream.WriteWord(WordToLE(15));