How to Install QODBC POS and Connect to QuickBooks POS on Windows 10

Install QODBC POS

Please download QODBC POS installer by clicking here

Right Click on the Installer and select, "Run As Administrator"

Please click on "Yes" in UAC window to install QODBC POS.

Follow the Installation steps from the Installer by clicking "Next" button till finish.

Installation completed.

Connect to QuickBooks POS via QODBC POS

First, Please open QuickBooks POS & load your company file:

Now, Please open VB Demo from Start Menu:

VB Demo started.

Now, We will connect to QuickBooks POS from VB Demo by clicking "Connection" >> "Add New Connection..."

VB Demo will ask you to select a QODBC POS DSN to access QuickBooks POS

Select DSN "QuickBooks POS Data" and click OK

QuickBooks POS will ask you to accept Application certificate. Click "Yes Always" button to allow VB Demo to access your QuickBooks POS company file.

VB Demo connected.

Now, You can use SQL statement to access QuickBooks POS.

If you are unable to connect, then Please change QuickBooks POS to run as multi-user mode. Click "Switch Company File to Multi User Mode" option in File Menu & try to connect using VB Demo.  

In QuickBooks POS references, you can see that QODBC POS has been included in the list of allowed applications:

You can open QuickBooks POS company preference from:
File >> Preferences >> Company

VB Demo is shown in the list of allowed applications:

Same way you should be able to use QODBC POS with your application(s).

Also, Refer:
QODBC POS could not access to QuickBooks POS Company File