Extracts the substring from the specified string starting from the left character and is intended for languages that use the double-byte character set (DBCS) like Japanese, Chinese, Korean etc.
| Name | Type | Description |
| arg1 | string | The text string containing the characters to extract. |
| arg2 | number | A number of the substring characters, based on bytes. |
builder.CreateFile("xlsx");
var oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
oWorksheet.GetRange("A1").SetValue(oFunction.LEFTB("Online Office", 6));
builder.SaveFile("xlsx", "LEFTB.xlsx");
builder.CloseFile();