diff --git a/components/fpspreadsheet/examples/fpsctrls/main.lfm b/components/fpspreadsheet/examples/fpsctrls/main.lfm
index 1277ab7ad..39090d974 100644
--- a/components/fpspreadsheet/examples/fpsctrls/main.lfm
+++ b/components/fpspreadsheet/examples/fpsctrls/main.lfm
@@ -1217,7 +1217,7 @@ object Form1: TForm1
       Action = acRenameWorksheet
     end
     object ToolButton1: TToolButton
-      Left = 126
+      Left = 232
       Height = 24
       Top = 0
       Width = 5
@@ -1225,7 +1225,7 @@ object Form1: TForm1
       Style = tbsDivider
     end
     object ToolButton2: TToolButton
-      Left = 131
+      Left = 237
       Top = 0
       Action = AcFileExit
     end
@@ -1235,7 +1235,7 @@ object Form1: TForm1
       Action = AcFileOpen
     end
     object ToolButton28: TToolButton
-      Left = 49
+      Left = 126
       Height = 24
       Top = 0
       Width = 5
@@ -1247,6 +1247,42 @@ object Form1: TForm1
       Top = 0
       Action = AcFileSaveAs
     end
+    object ToolButton39: TToolButton
+      Left = 131
+      Top = 0
+      Action = AcColAdd
+    end
+    object ToolButton40: TToolButton
+      Left = 155
+      Top = 0
+      Action = AcColDelete
+    end
+    object ToolButton41: TToolButton
+      Left = 184
+      Top = 0
+      Action = AcRowAdd
+    end
+    object ToolButton42: TToolButton
+      Left = 208
+      Top = 0
+      Action = AcRowDelete
+    end
+    object ToolButton43: TToolButton
+      Left = 49
+      Height = 24
+      Top = 0
+      Width = 5
+      Caption = 'ToolButton43'
+      Style = tbsDivider
+    end
+    object ToolButton44: TToolButton
+      Left = 179
+      Height = 24
+      Top = 0
+      Width = 5
+      Caption = 'ToolButton44'
+      Style = tbsDivider
+    end
   end
   object ToolBar3: TToolBar
     Left = 0
@@ -1326,7 +1362,7 @@ object Form1: TForm1
     object AcAddWorksheet: TsWorksheetAddAction
       Category = 'FPSpreadsheet'
       WorkbookSource = WorkbookSource
-      Caption = 'Add'
+      Caption = 'Add worksheet'
       Hint = 'Add empty worksheet'
       ImageIndex = 1
       NameMask = 'Sheet%d'
@@ -1334,7 +1370,7 @@ object Form1: TForm1
     object AcDeleteWorksheet: TsWorksheetDeleteAction
       Category = 'FPSpreadsheet'
       WorkbookSource = WorkbookSource
-      Caption = 'Delete...'
+      Caption = 'Delete worksheet...'
       Hint = 'Delete worksheet'
       ImageIndex = 2
     end
@@ -2041,12 +2077,40 @@ object Form1: TForm1
       Caption = 'Inspector'
       OnExecute = AcViewInspectorExecute
     end
+    object AcRowAdd: TAction
+      Category = 'Edit'
+      Caption = 'Add row'
+      Hint = 'Add row'
+      ImageIndex = 48
+      OnExecute = AcRowAddExecute
+    end
+    object AcColAdd: TAction
+      Category = 'Edit'
+      Caption = 'Add column'
+      Hint = 'Add column'
+      ImageIndex = 47
+      OnExecute = AcColAddExecute
+    end
+    object AcRowDelete: TAction
+      Category = 'Edit'
+      Caption = 'Delete row'
+      Hint = 'Delete row'
+      ImageIndex = 50
+      OnExecute = AcRowDeleteExecute
+    end
+    object AcColDelete: TAction
+      Category = 'Edit'
+      Caption = 'Delete column'
+      Hint = 'Delete column'
+      ImageIndex = 49
+      OnExecute = AcColDeleteExecute
+    end
   end
   object ImageList: TImageList
     left = 176
     top = 312
     Bitmap = {
-      4C69370000001000000010000000003F9300003F9300003F9300003F9424003F
+      4C693D0000001000000010000000003F9300003F9300003F9300003F9424003F
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       95CC004095CC00409599003F9400003F9300003F9324003F938A0E4B9CD33F76
       C0EC5D90D4FF3365A9FFA0A0A0FFA9A9A9FFA9A9A9FFAAAAAAFFACACACFFAEAE
@@ -3551,6 +3615,198 @@ object Form1: TForm1
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       FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
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+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
       FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
       FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
       FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
@@ -3844,6 +4100,24 @@ object Form1: TForm1
           Action = acRenameWorksheet
         end
       end
+      object MnuColumn: TMenuItem
+        Caption = 'Column'
+        object MenuItem90: TMenuItem
+          Action = AcColAdd
+        end
+        object MenuItem93: TMenuItem
+          Action = AcColDelete
+        end
+      end
+      object MnuRow: TMenuItem
+        Caption = 'Row'
+        object MenuItem91: TMenuItem
+          Action = AcRowAdd
+        end
+        object MenuItem92: TMenuItem
+          Action = AcRowDelete
+        end
+      end
       object MenuItem9: TMenuItem
         Caption = 'Cell'
         object MenuItem89: TMenuItem
diff --git a/components/fpspreadsheet/examples/fpsctrls/main.pas b/components/fpspreadsheet/examples/fpsctrls/main.pas
index ce35a2190..a80ce871c 100644
--- a/components/fpspreadsheet/examples/fpsctrls/main.pas
+++ b/components/fpspreadsheet/examples/fpsctrls/main.pas
@@ -14,6 +14,10 @@ type
   { TForm1 }
 
   TForm1 = class(TForm)
+    AcRowDelete: TAction;
+    AcColDelete: TAction;
+    AcRowAdd: TAction;
+    AcColAdd: TAction;
     AcViewInspector: TAction;
     ActionList: TActionList;
     AcFileExit: TFileExit;
@@ -106,6 +110,14 @@ type
     MenuItem87: TMenuItem;
     MenuItem88: TMenuItem;
     MenuItem89: TMenuItem;
+    MenuItem90: TMenuItem;
+    MenuItem91: TMenuItem;
+    MnuColumn: TMenuItem;
+    MenuItem93: TMenuItem;
+    MenuItem94: TMenuItem;
+    MnuAddWorksheet: TMenuItem;
+    MnuRow: TMenuItem;
+    MenuItem92: TMenuItem;
     MnuView: TMenuItem;
     MenuItem6: TMenuItem;
     MenuItem7: TMenuItem;
@@ -223,7 +235,13 @@ type
     ToolButton36: TToolButton;
     ToolButton37: TToolButton;
     ToolButton38: TToolButton;
+    ToolButton39: TToolButton;
     ToolButton4: TToolButton;
+    ToolButton40: TToolButton;
+    ToolButton41: TToolButton;
+    ToolButton42: TToolButton;
+    ToolButton43: TToolButton;
+    ToolButton44: TToolButton;
     ToolButton5: TToolButton;
     ToolButton6: TToolButton;
     ToolButton7: TToolButton;
@@ -232,8 +250,12 @@ type
     WorkbookSource: TsWorkbookSource;
     WorkbookTabControl: TsWorkbookTabControl;
     WorksheetGrid: TsWorksheetGrid;
+    procedure AcColAddExecute(Sender: TObject);
+    procedure AcColDeleteExecute(Sender: TObject);
     procedure AcFileOpenAccept(Sender: TObject);
     procedure AcFileSaveAsAccept(Sender: TObject);
+    procedure AcRowAddExecute(Sender: TObject);
+    procedure AcRowDeleteExecute(Sender: TObject);
     procedure AcViewInspectorExecute(Sender: TObject);
     procedure InspectorTabControlChange(Sender: TObject);
   private
@@ -290,6 +312,40 @@ begin
   end;
 end;
 
+{ Adds a column before the active cell }
+procedure TForm1.AcColAddExecute(Sender: TObject);
+begin
+  WorksheetGrid.InsertCol(WorksheetGrid.Col);
+  WorksheetGrid.Col := WorksheetGrid.Col + 1;
+end;
+
+{ Deletes the column with the active cell }
+procedure TForm1.AcColDeleteExecute(Sender: TObject);
+var
+  c: Integer;
+begin
+  c := WorksheetGrid.Col;
+  WorksheetGrid.DeleteCol(c);
+  WorksheetGrid.Col := c;
+end;
+
+{ Adds a row before the active cell }
+procedure TForm1.AcRowAddExecute(Sender: TObject);
+begin
+  WorksheetGrid.InsertRow(WorksheetGrid.Row);
+  WorksheetGrid.Row := WorksheetGrid.Row + 1;
+end;
+
+{ Deletes the row with the active cell }
+procedure TForm1.AcRowDeleteExecute(Sender: TObject);
+var
+  r: Integer;
+begin
+  r := WorksheetGrid.Row;
+  WorksheetGrid.DeleteRow(r);
+  WorksheetGrid.Row := r;
+end;
+
 { Toggles the spreadsheet inspector on and off }
 procedure TForm1.AcViewInspectorExecute(Sender: TObject);
 begin
diff --git a/components/fpspreadsheet/fpspreadsheetctrls.pas b/components/fpspreadsheet/fpspreadsheetctrls.pas
index 21fcc37bc..5b7fac182 100644
--- a/components/fpspreadsheet/fpspreadsheetctrls.pas
+++ b/components/fpspreadsheet/fpspreadsheetctrls.pas
@@ -532,10 +532,10 @@ begin
   SetLength(destSelection, Length(FPendingSelection));
   for i := 0 to High(FPendingSelection) do
     destSelection[i] := TsCellRange(Rect(
-      FPendingSelection[i].Row1 + ofsRow,
-      FPendingSelection[i].Col1 + ofsCol,
-      FPendingSelection[i].Row2 + ofsRow,
-      FPendingSelection[i].Col2 + ofsCol
+      LongInt(FPendingSelection[i].Row1) + ofsRow,
+      LongInt(FPendingSelection[i].Col1) + ofsCol,
+      LongInt(FPendingSelection[i].Row2) + ofsRow,
+      LongInt(FPendingSelection[i].Col2) + ofsCol
     ));
 
   // Check for intersection between source and destination ranges