How to Turn on / off flight mode ?

[yychbox]

How to Turn on / off flight mode with vb.net for ppc?
I have seached for it,but how to Declare?
Thanks for you help me ,please help me to all code about it.
I am a chinese , my poor english ability,forgeive me !!
"lineSetEquipmentState(hLine, LINEEQUIPSTATE_MINIMUM)
lineSetEquipmentState(hLine, LINEEQUIPSTATE_FULL)
lineRegister(hLine, LINEREGMODE_AUTOMATIC, NULL, LINEOPFORMAT_NONE)"