PDF Text Field

[Lee]

I have a PDF with a number of text fields that have a number format. I am updating them with calculated values: 

     If PDFdocument.AcroForm.FormFields.Contains(row.Item("XMLField").ToString()) Then
         field = PDFdocument.AcroForm.FormFields.Item(row.Item("XMLField").ToString())

         Select Case field.FieldType
               Case FormFieldType.TextBox
                         ModifyTextBox(CType(field, TextBoxField), OutText)
               Case FormFieldType.CheckBox
                         Try
                              ModifyCheckBox(CType(field, CheckBoxField), New String() {row.Item("OutText").ToString()})
                         Catch
                         End Try
         End Select
     End If

When this executes the number format is over written and I see 1222777.00 instead of 1,222,777.00.

Is there a way to either not lose the number format or reset the number format for the PDF Text field.? 

[Lee]

Moved to Telerik document processing