(IMPORTANT) Fixed error- WNDPROC return value cannot be converted to LRESULT Type…

[fspofficial]

The error "WNDPROC return value cannot be converted to LRESULT TypeError: WPARAM is simple, so must be an int object (got NoneType)" is occurring because the on_destroy method is not returning any value explicitly, and as a result, it returns None by default. However, in this case, on_destroy should return an integer value (LRESULT). To fix the issue, you can add return 0 at the end of the on_destroy method to explicitly return 0.

Here's the modified on_destroy method:

def on_destroy(self, hwnd, msg, wparam, lparam):
    """Clean after notification ended.

    :hwnd:
    :msg:
    :wparam:
    :lparam:
    """
    nid = (self.hwnd, 0)
    Shell_NotifyIcon(NIM_DELETE, nid)
    PostQuitMessage(0)

    return 0  # Explicitly return 0 to fix the error

With this change, the on_destroy method will now return an integer value (LRESULT) as expected, and the error should be resolved.