How do I hide the "Devices and Printers" of hardware component in Windows 7

For example: want to remove the camera device in devices and printers

Just need to add red part in device ASL code.

Device(PRT3) {  

     Name(_ADR, 0x00000003)

               Name(_UPC, package() {

                                       0x00,

                                              0xFF,

                              0x00000000,

                                           0x00000000

                })

                //

                // Using method _RMV remove component

                //

                Method(_RMV,0)

                {

                     Return(0x00)  // 0 : Unremovable 1: Removable

                }

          }