Online Development Notebook > Index > ODN > USBm DLL Programming > DLL Commands > NumberOfDevices

NumberOfDevices

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Description:

This is a USBm.dll function that returns the number of valid devices on the USB bus. (0 to 20)

 

Command Syntax:

number USBm_NumberOfDevices()

The USBm_NumberOfDevices function syntax has these parts:

 

Remarks:

Note: USBm_NumberOfDevices does not return TRUE⁄FALSE. The return value is the number of detected devices.

 

VB Declaration (USBmAPI.bas)

Public Declare Function USBm_NumberOfDevices _     Lib "USBm.dll" _         () _     As Integer

 

VB Example

Dim result As Integer     result USBm_NumberOfDevices

This code fragment shows that result is loaded with the number of detected devices.

 

C Example

-TBD-

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Hardware:  U401 USB Interface    U421 USB Interface

Programming:  USBm DLL Programming    Download Files

Application Notes:  U4x1 Application Notes    Misc Applications and Information    FAQ