Online Development Notebook > Index > Programming Overview > DLL Commands > Version

Version - Return the DLL version


This is a USBm.dll function that returns the version of the DLL.

Command Syntax:

number USBm_Version( string )

The USBm_Version function syntax has these parts:

Part Description
string Any valid string expression.


In VB the string passed as an argument must be large enough to hold all the characters that the function places in the string. The best way to acheive this is to set the string to a large size with the String function as in this code:

strStrng = String(250, " ")

Note: USBm_Version does not return TRUE⁄FALSE. The return value is the integer version number.

Note: USBm_Version does not affect the internal error string.

VB Declaration (USBmAPI.bas)

Public Declare Function USBm_Version _
    Lib "USBm.dll" _
        (ByVal versionstring As String) _
    As Integer

VB Example

Dim strng As String * 255
Dim result As Integer

    result = USBm_Version strng
    frmStatus.lstDevices.AddItem "About the USBm DLL: " & strng

This code fragment shows that strng is loaded with the "version" text of the DLL. Assuming that the form called "Main" exists with a text box called "Info", the "version" information will be made visible to the user. "Result" will contain a numerical version number.

C Prototype

int USBm_Version( char *version );

C Example


About, Copyright, Version Date, and Version Number are all handled by the RobotBASIC function usbm_DllSpecs().


Returns a string that contains information about the DLL. There are four sections seperated by the | character. You can use the Extract() function to extract each section seperately if desired. The sections are:



Version Date

Version Number

Hardware:  U401 USB Interface    U421 USB Interface   U451 USB Interface

Programming:  USBm DLL Programming    Download Files

Application Notes:  U4x1 Application Notes    Misc Applications and Information    FAQ

While every effort has been made to make sure that the information posted on this site is correct, the author can not be held liable for any damages whatsoever for losses as a result of the application of this information. Use this information at your own risk.

USBmicro can design your custom and semi-custom USB product. Email about USB design can be directed to " Robert " at

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