if the similar feature that I made for Outlook ever shows its window visibly loading for awhile at computer startup, then I'll need to use the commented code below:
    HandleCreatedOutlookEvent(hWinEventHook, event, hWnd, *)
    {
        static outlookIsBeingLoaded := false

        ; Most windowing functions that are given a pure HWND will also work while it's hidden (dunno if it matters here but still)
        try shouldExecute := WinGetClass(hWnd) = "Olk Host" && !outlookIsBeingLoaded

        if (shouldExecute ?? false)
        {
            outlookIsBeingLoaded := true
WinSetTransparent(0, hWnd)
            ComCall(5, tbl, "Ptr", hWnd) ; Calls tbl.DeleteTab(winId), which deletes a tab from the TaskbarList
            DllCall("UnhookWinEvent", "Ptr", hWinEventHook)

     ;       while (!WinExist("- Outlook ahk_exe olk.exe")) ; Minimum delay for the minimize to work
     ;           WinSetTransparent(0, hWnd) ; Making Outlook temporarily transparent (multiple times because it doesn't always work)

     ;       WinSetTransparent(0, hWnd) ; Making Outlook temporarily transparent (again in case the loop above didn't already succeed)
WinWait("- Outlook ahk_exe olk.exe") ; Minimum delay for the minimize to work
            Sleep(2000) ; Extra delay to make sure that outlook has fully loaded before minimizing it and then outlook won't have to load once the user activates it
            WinMinimize(hWnd)
            WinSetTransparent("Off", hWnd)
            ComCall(4, tbl, "Ptr", hWnd) ; Calls tbl.AddTab(winId), which adds a tab to the TaskbarList
        }
    }