请问：怎样处理消息，可以使窗口失去焦点时暂停并等待获得焦点。

@NewMessage:
  invoke PeekMessage,addr msg,NULL,0,0,PM_REMOVE
  or EAX,EAX
  jz ks@z
  invoke TranslateMessage,addr msg
  invoke DispatchMessage,addr msg
  jmp @NewMessage
ks@z:
  call hs+hsjg.cj
  call hs+hsjg.jianpan
  call hs+hsjg.sb
  call hs+hsjg.sjb
  jmp @NewMessage

WndProc PROC  uses ESI EDI EBX hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
  invoke DefWindowProc, hWnd, uMsg, wParam, lParam
ret
WndProc ENDP

@NewMessage:
  invoke PeekMessage,addr msg,NULL,0,0,PM_REMOVE
  or EAX,EAX
  jz ks@z
  invoke TranslateMessage,addr msg
  invoke DispatchMessage,addr msg
  jmp @NewMessage
ks@z:
  call hs+hsjg.cj
  call hs+hsjg.jianpan
  call hs+hsjg.sb
  call hs+hsjg.sjb
  jmp @NewMessage

WndProc PROC  uses ESI EDI EBX hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
    cmp DWORD ptr uMsg,WM_ACTIVATEAPP
    jnz @F
    cmp DWORD ptr wParam,0
    jz 这里发现失去焦点，怎样处理让程序暂停？并等待得到焦点时继续运行？
@@:

  invoke DefWindowProc, hWnd, uMsg, wParam, lParam
ret
WndProc ENDP