|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.
number USBm_Version( string )
The USBm_Version function syntax has these parts:
|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) _
|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.
|int USBm_Version( char *version );|
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:
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
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