UsbQueryNumberDevices

Obtains the total number of USB devices currently attached.

Syntax

ulrc=UsbQueryNumberDevices(*pulNumDev)

Parameters

pulNumDev

Return Code

Errors

[0000] - NO_ERROR
[0057] - ERROR_INVALID_PARAMETER
[1B58] - USB_NOT_INIT (7000)
[FF13] - ERROR_I24_INVALID_PARAMETER
[FF1F] - ERROR_GEN_FAILURE
[FF57] - ERROR_INVALID_PARAMETER