How does matlab handle activex variant function calls?

I am calling an activex control that interfaces with a usb device. I can get as far as to see the function calls but I can't seem to get data back and forth like I do in python. The first thing I do is pass in text of the usb device id and then I get a handle string back that I pass into the openpipe function, then I can access the usb device via the read functions. In matlab it returns an NAN when I try GetConnectedDevices. In python it has to build a com wrapper file to translate the data, is matlab not translating the data it gets back right?

>> device = actxserver('USBommited.ommited.1'); >> invoke(device) GetConnectedDevices = Variant GetConnectedDevices(handle, string) OpenPipe = uint32_T OpenPipe(handle, string) ClosePipe = void ClosePipe(handle) ReadPipe = [uint32_T, Variant(Pointer)] ReadPipe(handle, uint32_T) ReadPipeBytes = Variant ReadPipeBytes(handle, uint32_T)

>> iscom(device)

ans =

     1

>> ismethod(device,'GetConnectedDevices')

ans =

     1

>> device.GetConnectedDevices('CC476332-BBC1-4737-8376-B237C00199C0')

ans =

   NaN

>>

[Steven]

>> invoke(device)

GetConnectedDevices = Variant GetConnectedDevices(handle, string)

OpenPipe = uint32_T OpenPipe(handle, string)

ClosePipe = void ClosePipe(handle)

ReadPipe = [uint32_T, Variant(Pointer)] ReadPipe(handle, uint32_T)

GetDeviceDescriptor = [uint32_T, Variant(Pointer)] GetDeviceDescriptor(handle, string)

GetStringDescriptor = [uint32_T, string] GetStringDescriptor(handle, string, char, uint16_T)

GetParentDeviceInstanceID = string GetParentDeviceInstanceID(handle, string, string)

ReadPipeBytes = Variant ReadPipeBytes(handle, uint32_T)