Returns the sheet number of the referenced sheet.
| Name | Type | Description |
| arg1 | string | Is the name of a sheet or a reference that you want the sheet number of. If omitted the number of the sheet containing the function is returned. |
builder.CreateFile("xlsx");
const oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
var result = oFunction.SHEET("Sheet1");
oWorksheet.GetRange("C3").SetValue(result);
builder.SaveFile("xlsx", "SHEET.xlsx");
builder.CloseFile();