UG documentation 999921: how to change the comment indicator color

Document-Processing/Excel/Excel-Library/NET/faqs/how-to-change-the-comment-indicator-color.md

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+---
+title: How to change the comment indicator color? | Syncfusion
+description: This page explains how to change the comment indicator color in Excel using the Syncfusion .NET Excel library (XlsIO).
+platform: document-processing
+control: XlsIO
+documentation: UG
+---
+
+# How to change the comment indicator color?
+
+In Excel, comment indicators are small triangles displayed in the upper-right corner of cells that contain comments. XlsIO allows you to customize the appearance of comment indicators by creating a shape and positioning it over the comment cell. You can set the fill color of the shape to change the indicator color.
+
+The following code example illustrates how to change the comment indicator color by creating a custom shape with the desired color.
+
+{% tabs %}  
+{% highlight c# tabtitle="C# [Cross-platform]" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    // Set the default version as Excel 2016
+    excelEngine.Excel.DefaultVersion = ExcelVersion.Excel2016;
+    // Create a new workbook
+    IWorkbook workbook = excelEngine.Excel.Workbooks.Create(1);
+    IWorksheet worksheet = workbook.Worksheets[0];
+
+    int height = 8;
+    int width = 5;
+
+    // Add a comment to cell A1
+    ICommentShape comment = worksheet.Range["A1"].AddComment();
+
+    // Create a right triangle shape to act as custom indicator
+    IShape shape = worksheet.Shapes.AddAutoShapes(AutoShapeType.RightTriangle, 1, 1, width, height);
+    // Position the shape at the upper-right corner of the cell
+    shape.Left = (int)worksheet.GetColumnWidthInPixels(1) - height;
+    // Rotate to point downward
+    shape.ShapeRotation = 180;
+    // Set the indicator (shape) color to blue
+    shape.Fill.ForeColor = Color.Blue;
+
+    // Save the workbook to a file
+    workbook.SaveAs(Path.GetFullPath("Output/CommentIndicatorColor.xlsx"));
+}
+{% endhighlight %}
+
+{% highlight c# tabtitle="C# [Windows-specific]" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    // Set the default version as Excel 2016
+    excelEngine.Excel.DefaultVersion = ExcelVersion.Excel2016;
+    // Create a new workbook
+    IWorkbook workbook = excelEngine.Excel.Workbooks.Create(1);
+    IWorksheet worksheet = workbook.Worksheets[0];
+
+    int height = 8;
+    int width = 5;
+
+    // Add a comment to cell A1
+    ICommentShape comment = worksheet.Range["A1"].AddComment();
+
+    // Create a right triangle shape to act as custom indicator
+    IShape shape = worksheet.Shapes.AddAutoShapes(AutoShapeType.RightTriangle, 1, 1, width, height);
+    // Position the shape at the upper-right corner of the cell
+    shape.Left = (int)worksheet.GetColumnWidthInPixels(1) - height;
+    // Rotate to point downward
+    shape.ShapeRotation = 180;
+    // Set the indicator (shape) color to blue
+    shape.Fill.ForeColor = System.Drawing.Color.Blue;
+
+    // Save the workbook to a file
+    workbook.SaveAs("CommentIndicatorColor.xlsx");
+}
+{% endhighlight %}
+
+{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %}
+Using excelEngine As New ExcelEngine()
+    ' Set the default version as Excel 2016
+    excelEngine.Excel.DefaultVersion = ExcelVersion.Excel2016
+    ' Create a new workbook
+    Dim workbook As IWorkbook = excelEngine.Excel.Workbooks.Create(1)
+    Dim worksheet As IWorksheet = workbook.Worksheets(0)
+
+    Dim height As Integer = 8
+    Dim width As Integer = 5
+
+    ' Add a comment to cell A1
+    Dim comment As ICommentShape = worksheet.Range("A1").AddComment()
+
+    ' Create a right triangle shape to act as custom indicator
+    Dim shape As IShape = worksheet.Shapes.AddAutoShapes(AutoShapeType.RightTriangle, 1, 1, width, height)
+    ' Position the shape at the upper-right corner of the cell
+    shape.Left = CInt(worksheet.GetColumnWidthInPixels(1)) - height
+    ' Rotate to point downward
+    shape.ShapeRotation = 180
+    ' Set the indicator (shape) color to blue
+    shape.Fill.ForeColor = Color.Blue
+
+    ' Save the workbook to a file
+    workbook.SaveAs("CommentIndicatorColor.xlsx")
+End Using
+{% endhighlight %}
+{% endtabs %}