Display system menu

I am trying to make a system menu display from another application at the current position of cursor.(though currently I can not get it to display at all)

Exactly the same as when you right click on a a task in the task bar at the bottom of screen.

I have the window handle of the other application.

The following code is executed when the event WM_CONTEXTMENU is received(i know it passes here as it displays a message box if i put it in there.

Code:

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HMENU hMenu;
hMenu = GetSystemMenu(testItem->hWnd, 0);
TrackPopupMenuEx(hMenu, TPM_LEFTBUTTON || TPM_LEFTALIGN, 50, 50, testItem->hWnd, NULL);

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It compiles fine but i get no menu.
I can not get it to work for the life of me.

This is how to do it

Code:

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    HMENU hmenu = GetSystemMenu(testItem->hWnd, FALSE);
    if (hmenu) {
        POINT pt;
                                       
        GetCursorPos(&pt);
        int cmd = TrackPopupMenu(hmenu, TPM_LEFTBUTTON|TPM_RIGHTBUTTON|TPM_RETURNCMD, pt.x, pt.y, 0, hwnd, NULL);
                                       
        if (cmd) {
            SetForegroundWindow(testItem->hWnd);        // reactivate window after the context menu has closed
            PostMessage(testItem->hWnd, WM_SYSCOMMAND, cmd, 0);
        }
    }

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