Export Crystal Report to excel

Hi!

I'm creating an application where the user can select to export the crystal report without open it. The user will not see the report but it should run so I can have the data to export. I'm having problems when I try to close the report viewer form. I get the message: "InvalidOperationException was unhandled. Value Close() cannot be called while doing CreateHandle()". Does anyone know how should I close this report without errors?

Thanks!!!!

rptDoc1.ExportToDisk(ExportFormatType.ExcelRecord, filePath);

crRV1.ReportSource = rptDoc1;

if (MessageBox.Show("Report " + filePath + " exported successfully.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information) == DialogResult.OK)

{

this.Hide();

this.Close(); // I get the message here:  InvalidOperationException was unhandled. Value Close() cannot be called while doing CreateHandle().

this.Dispose();

}