//https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/ms644986(v=vs.85)
private IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0)
{
User32_MouseHook.MouseMessages msg = (User32_MouseHook.MouseMessages)wParam;
User32_MouseHook.MSLLHOOKSTRUCT hookStruct = (User32_MouseHook.MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(User32_MouseHook.MSLLHOOKSTRUCT));
MouseEventArgs32 e = new MouseEventArgs32(msg, ref hookStruct);
MessageUtil.BeginInvoke(() => OnMouseMessage(null, e));
}
return(User32_MouseHook.CallNextHookEx(_hookID, nCode, wParam, lParam));
}