3 ms·

Currently PostMessage/GetMessage I think are syscalls, TranslateMessage/DispatchMessage are not most of the time.

• quotemstr 12y ago
  DefWindowProc is a system call. Really, switching to kernel mode is not as expensive as people suppose.
  • yuhong 12y ago
    DefWindowProc is not always a system call. It depends on the message being tried for example.