// Silk Test code to delete cookies using command line.

[+] void DeleteCookies()
    [ ] // Close All Browsers
    [ ]
    [ ] SYS_Execute("RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 2")


Here are the different options for various tasks:
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echo Clear Temporary Internet Files:
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 8

echo Clear Cookies:
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 2

echo Clear History:
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 1

echo Clear Form Data:
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 16

echo Clear Saved Passwords:
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 32

echo Delete All:
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 255

echo Delete All w/Clear Add-ons Settings:
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 435

For more details click here.