This will clear any value/graphic pair out of the device that matches the given value parameter.
Public Function DeviceVGP_Clear(ByVal dvRef As Integer, ByVal Value As Double) As Boolean
Success = hs.DeviceVGP_Clear(ref, Value)
Where:
ref= device reference #
Value = The value of the value/graphic pair you wish removed.
You can check the return value (Boolean) to determine if it was successful or not.