Returns a class formatted according to the instructions contained in the format expression.
| Name | Type | Default | Description |
| expression | string | Any valid expression. |
|
| format | string | null | A valid named or user-defined format expression. |
builder.CreateFile("xlsx");
var oWorksheet = Api.GetActiveSheet();
var oFormat = Api.Format("123456", ["$#,##0"]);
oWorksheet.GetRange("A1").SetValue(oFormat);
builder.SaveFile("xlsx", "Format.xlsx");
builder.CloseFile();