Disclosure Statement: This site contains affiliate links, which means that I may receive a commission if you make a purchase using these links. As an eBay Partner, I earn from qualifying purchases.
If you find these projects useful please consider becoming a sponsor with Patreon, GitHub or Liberapay.
Use the TChromiumCore.OnChromeCommand event and set aResult to True if command_id is IDC_NEW_WINDOW or IDC_NEW_TAB.
There are many keyboard shortcuts in Chromium that can be intercepted with TChromiumCore.OnChromeCommand.
Just set a breakpoint in that event using MiniBrowser and read the command_id value.