横秋扫盲系列(1): MessageBox 消息对话框 -- 2005-8-7 16:37:30

王朝vc·作者佚名  2006-01-10
窄屏简体版  字體: |||超大  

1.参数的使用(MB_SYSTEMMODAL和MB_SERVICE_NOTIFICATION)

MB_SYSTEMMODAL 所有窗口的Modal模式,含 WS_EX_TOPMOST 风格(该风格可通过MB_TOPMOST单独设定)

MB_SERVICE_NOTIFICATION 显示在当前桌面,即使没有用户登录(一般用于service 服务)

2.MessageBoxIndirect (一般用于自定义图标)

MSGBOXPARAMS msgBox;

msgBox.cbSize = sizeof(MSGBOXPARAMS);

msgBox.dwStyle = MB_USERICON | nButtons;

msgBox.hInstance = AfxGetApp()->m_hInstance;

msgBox.hwndOwner = NULL;

msgBox.lpszCaption = lpszTitle;

msgBox.lpszIcon = MAKEINTRESOURCE(nResourceID);//资源中的ICON

msgBox.lpszText = lpszText;

MessageBoxIndirect(&msgBox);

3.WH_CBT 钩子 (一般用于设定窗口位置和修改按钮文本)

a)设定窗口的位置(http://support.microsoft.com/default.aspx?scid=kb;en-us;180936

HHOOK hHook;

LRESULT CALLBACK CBTProc(int nCode,WPARAM wParam,LPARAM lParam)

{

if(nCode == HCBT_ACTIVATE)

{

RECT rect;

GetWindowRect(hWnd, &rect);

MoveWindow((HWND)hWnd, 0, 0, rect.right-rect.left, rect.bottom-rect.top, TRUE);

}

return CallNextHookEx(hHook, nCode, wParam, lParam);

}

使用方法

hHook = SetWindowsHookEx(WH_CBT, CBTProc, GetModuleHandle(NULL), 0);

MessageBox(NULL, "hello world!", "info", MB_OK);

b)修改按钮文本(一般用于国际化)

HHOOK hHook;

LRESULT __stdcall CBTHookProc( long nCode,WPARAM wParam,LPARAM lParam)

{

if (nCode==HCBT_ACTIVATE)

{

SetDlgItemText((HWND)wParam,IDYES,"&Yes");

SetDlgItemText((HWND)wParam,IDNO ,"&No");

SetDlgItemText((HWND)wParam,IDOK,"&OK");

SetDlgItemText((HWND)wParam,IDCANCEL,"&Cancel");

UnhookWindowsHookEx(hHook);

}

return 0;

}

使用方法:

hHook=SetWindowsHookEx(WH_CBT,(HOOKPROC)CBTHookProc,AfxGetInstanceHandle(),NULL);

P.S. 过一段时间消失的MessageBox(源自MSDN)

void CALLBACK MessageBoxTimer(HWND hwnd, UINT uiMsg, UINT idEvent, DWORD dwTime)

{

PostQuitMessage(0);

}

UINT TimedMessageBox(HWND hwndParent, LPCTSTR ptszMessage, LPCTSTR ptszTitle, UINT flags, DWORD dwTimeout)

{

MSG msg;

UINT idTimer = SetTimer(NULL, 0, dwTimeout, (TIMERPROC)MessageBoxTimer);

UINT uiResult = MessageBox(hwndParent, ptszMessage, ptszTitle, flags);

KillTimer(NULL, idTimer);

if (PeekMessage(&msg, NULL, WM_QUIT, WM_QUIT, PM_REMOVE)) {

uiResult = 0;//默认值

}

return uiResult;

}

使用方法同MessageBox,只是多了个DWORD参数 dwTimeout

 
 
 
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