Alternating Icons w/ DrawImages?

[KINGMOFO]

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CB_DrawImages hDlg message wParam lParam 3 "\King Mofo\User - Boy.ico[]\King Mofo\User - Girl.ico"

There is what I tried, but the icon doesn't change with each new item that's added to the CB. I'm not using preset text in the CB. How can I make my two icons alternate for each new item added to the CB. BTW i'm using the QM Drag Drop code to add the items.