diff --git a/components/fpspreadsheet/examples/fpsgrid_no_install/mainfrm.lfm b/components/fpspreadsheet/examples/fpsgrid_no_install/mainfrm.lfm
index c6d3c1932..dd6f67b9b 100644
--- a/components/fpspreadsheet/examples/fpsgrid_no_install/mainfrm.lfm
+++ b/components/fpspreadsheet/examples/fpsgrid_no_install/mainfrm.lfm
@@ -52,6 +52,10 @@ object Form1: TForm1
     Top = 0
     Width = 676
     OnChange = TabControlChange
+    TabIndex = 0
+    Tabs.Strings = (
+      'Sheet 1'
+    )
     Align = alClient
     TabOrder = 1
   end
diff --git a/components/fpspreadsheet/examples/fpsgrid_no_install/mainfrm.pas b/components/fpspreadsheet/examples/fpsgrid_no_install/mainfrm.pas
index 21ceaf6de..f257a9cdb 100644
--- a/components/fpspreadsheet/examples/fpsgrid_no_install/mainfrm.pas
+++ b/components/fpspreadsheet/examples/fpsgrid_no_install/mainfrm.pas
@@ -84,6 +84,7 @@ end;
 procedure TForm1.BtnNewClick(Sender: TObject);
 begin
   TabControl.Tabs.Clear;
+  TabControl.Tabs.Add('Sheet1');
   Grid.NewWorkbook(26, 100);
 end;
 
@@ -135,11 +136,8 @@ begin
       ]);
 
       // Collect the sheet names in the Tabs of the TabControl for switching sheets.
-      if Grid.Workbook.FileFormat <> sfExcel2 then
-      begin
-        Grid.GetSheets(TabControl.Tabs);
-        TabControl.TabIndex := 0;
-      end;
+      Grid.GetSheets(TabControl.Tabs);
+      TabControl.TabIndex := 0;
     except
       on E:Exception do begin
         // Empty worksheet instead of the loaded one
diff --git a/components/fpspreadsheet/fpsactions.pas b/components/fpspreadsheet/fpsactions.pas
index afb2ccd44..730ac7a7b 100644
--- a/components/fpspreadsheet/fpsactions.pas
+++ b/components/fpspreadsheet/fpsactions.pas
@@ -688,12 +688,14 @@ end;
 
 procedure TsCopyFormatAction.ExecuteTarget(Target: TObject);
 begin
+  Unused(Target);
   Checked := true;
   WorkbookSource.SetPendingOperation(poCopyFormat, Worksheet.GetSelection);
 end;
 
 procedure TsCopyFormatAction.UpdateTarget(Target: TObject);
 begin
+  Unused(Target);
   if WorkbookSource.PendingOperation = poNone then Checked := false;
 end;
 
@@ -703,6 +705,7 @@ end;
 
 procedure TsAutoFormatAction.ExecuteTarget(Target: TObject);
 begin
+  Unused(Target);
   ApplyFormatToSelection;
 end;
 
@@ -1044,9 +1047,7 @@ procedure TsCellBorderAction.ApplyFormatToRange(ARange: TsCellRange);
 
 var
   r, c: LongInt;
-  ls: TsLineStyle;
   bs: TsCellBorderStyle;
-  cell: PCell;
 begin
   // Top edges
   Borders.North.ApplyStyle(Workbook, bs);
@@ -1091,6 +1092,7 @@ end;
 
 procedure TsCellBorderAction.ExecuteTarget(Target: TObject);
 begin
+  Unused(Target);
   ApplyFormatToSelection;
 end;
 
@@ -1116,6 +1118,7 @@ end;
 
 procedure TsNoCellBordersAction.ExecuteTarget(Target: TObject);
 begin
+  Unused(Target);
   ApplyFormatToSelection;
 end;
 
@@ -1205,6 +1208,7 @@ end;
 
 procedure TsCommonDialogSpreadsheetAction.ExecuteTarget(Target: TObject);
 begin
+  Unused(Target);
   DoBeforeExecute;
   FExecuteResult := FDialog.Execute;
   if FExecuteResult then
diff --git a/components/fpspreadsheet/fpspreadsheet.pas b/components/fpspreadsheet/fpspreadsheet.pas
index 6cdba02d7..591a463ff 100755
--- a/components/fpspreadsheet/fpspreadsheet.pas
+++ b/components/fpspreadsheet/fpspreadsheet.pas
@@ -6317,6 +6317,8 @@ var
   i: Integer;
   ok: Boolean;
 begin
+  buf[0] := 0;  // Silence the compiler...
+
   Result := false;
   stream := TFileStream.Create(AFileName, fmOpenRead + fmShareDenyNone);
   try
diff --git a/components/fpspreadsheet/fpspreadsheetctrls.pas b/components/fpspreadsheet/fpspreadsheetctrls.pas
index 5cd6adb97..928c99f19 100644
--- a/components/fpspreadsheet/fpspreadsheetctrls.pas
+++ b/components/fpspreadsheet/fpspreadsheetctrls.pas
@@ -517,7 +517,7 @@ procedure TsWorkbookSource.ExecutePendingOperation;
 var
   destSelection: TsCellRangeArray;
   srcCell, destCell: PCell;    // Pointers to source and destination cells
-  i, j, k: Integer;
+  i, j, k: Cardinal;
   ofsRow, ofsCol: LongInt;
 
   function DistinctRanges(R1, R2: TsCellRange): Boolean;
@@ -1053,7 +1053,6 @@ procedure TsWorkbookTabControl.ListenerNotification(
   AChangedItems: TsNotificationItems; AData: Pointer = nil);
 var
   i: Integer;
-  t: Integer;
 begin
   Unused(AData);
 
@@ -1062,9 +1061,7 @@ begin
   begin
     inc(FLockCount);    // avoid WorkbookSelect message when adding each tab
     GetSheetList(Tabs);
-    t := TabIndex;
     TabIndex := Tabs.Count-1;
-    t := TabIndex;
     dec(FLockCount);
   end;
 
@@ -1075,8 +1072,6 @@ begin
     if i <> TabIndex then
       TabIndex := i;
   end;
-
-  t := TabIndex;
 end;
 
 {@@ ----------------------------------------------------------------------------
@@ -1417,6 +1412,7 @@ end;
 -------------------------------------------------------------------------------}
 procedure TsCellCombobox.ApplyFormatToCell(ACell: PCell);
 begin
+  Unused(ACell);
 end;
 
 {@@ ----------------------------------------------------------------------------
@@ -1425,6 +1421,7 @@ end;
 -------------------------------------------------------------------------------}
 procedure TsCellCombobox.ExtractFromCell(ACell: PCell);
 begin
+  Unused(ACell);
 end;
 
 {@@ ----------------------------------------------------------------------------
diff --git a/components/fpspreadsheet/fpspreadsheetgrid.pas b/components/fpspreadsheet/fpspreadsheetgrid.pas
index 7b0ca0352..1aba97016 100644
--- a/components/fpspreadsheet/fpspreadsheetgrid.pas
+++ b/components/fpspreadsheet/fpspreadsheetgrid.pas
@@ -999,7 +999,7 @@ end;
 -------------------------------------------------------------------------------}
 procedure TsCustomWorksheetGrid.Convert_sFont_to_Font(sFont: TsFont; AFont: TFont);
 begin
-  fpsVisualUtils.Convert_sFont_to_Font(Workbook, sFont, Font);
+  fpsVisualUtils.Convert_sFont_to_Font(Workbook, sFont, AFont);
 end;
 
 {@@ ----------------------------------------------------------------------------