saving the database records into excel file,pop up message

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C#

my code as follows saving the database records in to excel for that code as follows;

xlWorkBook.SaveAs(@"C:\CourseWiseReport.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);


when i save the excel,before saving the excel file message shows

A file named 'C:\courseWiseReprot.xls' already exists in this loaction.Do you want to replace it?
Yes No Cancel.

when i save the excel,when i click the button i want to show the message as follows

Excel File Created.

i want to show the above message only.
i do not want
A file named 'C:\courseWiseReprot.xls' already exists in this loaction.Do you want to replace it?
Yes No Cancel.
the previous message.

how can i do?

help me.