Hi Trieu ,
To integrate Syncfusion WinForms
Control into a VSTO Excel add-in, follow the steps below:
Here
is an example for integrating the SfDatagrid in VSTO Excel add-in.
Step
1: Start Visual Studio.
Step
2: Create a VSTO Excel Add-in project.

Step
3: Include a Form in VSTO Excel Add-in project and load the SfDataGrid control.
Refer the DataGrid Control related details in below link.
UG Link : https://help.syncfusion.com/windowsforms/datagrid/overview

Step 4: In the ThisAddIn class,
within the ThisAddIn_Startup event , use the form.Show() method to display the
Form.
Code Snippet:
|
private void
ThisAddIn_Startup(object sender, System.EventArgs e)
{
Form1 form = new Form1();
form.Show();
}
|

Step
5: Run the application; you will see Excel with Syncfusion controls, as shown
in the image below:
Output Image Reference:

We have provided a sample for
integrating the SfDataGrid in a VSTO Excel add-in for your reference. Based on
your requirement, you can modify the sample. Kindly refer to the sample and let
us know if you have any further concerns on this.
Attachment:
VSTOExcelAddInSample_c228ea25.zip