Read Crystal report parameter in c#

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.NET3.5

C#

.NET

CrystalReports

I have a crystal report parameter to set devision.
But to select the division I have to first select the company.
In crystal report, both of this included in one parameter.
How can I read this two seperately when reading from c# code?

I have a code to read parameters of crystal report.

foreach (ParameterFieldDefinition pd in cryRpt.DataDefinition.ParameterFields)
{
    //get parameter information
}