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pfnNewUrb  ,
(PVUSBIROOTHUBCONNECTOR pInterface, uint8_t DstAddress, uint32_t cbData, uint32_t cTds)   

Allocates a new URB for a transfer.

Either submit using pfnSubmitUrb or free using VUSBUrbFree().

Pointer to a new URB.

NULL on failure - try again later. This will not fail if the device wasn't found. We'll fail it at submit time, since that makes the usage of this api simpler.

pInterface Pointer to this struct.
DstAddress The destination address of the URB.
cbData The amount of data space required.
cTds The amount of TD space.

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