未公开函数MessageBoxTimeOut 实现定时消息(ZT) MFC实现MessageBox自动消失

http://www.blogjava.net/baicker/archive/2007/07/13/130072.html

 #include <windows.h>
 #include <tchar.h>

 //Functions & other definitions required-->
 typedef int (__stdcall *MSGBOXAAPI)(IN HWND hWnd,
         IN LPCSTR lpText, IN LPCSTR lpCaption,
         IN UINT uType, IN WORD wLanguageId, IN DWORD dwMilliseconds);
 typedef int (__stdcall *MSGBOXWAPI)(IN HWND hWnd,
         IN LPCWSTR lpText, IN LPCWSTR lpCaption,
         IN UINT uType, IN WORD wLanguageId, IN DWORD dwMilliseconds);

 int MessageBoxTimeoutA(IN HWND hWnd, IN LPCSTR lpText,
     IN LPCSTR lpCaption, IN UINT uType,
     IN WORD wLanguageId, IN DWORD dwMilliseconds);
 int MessageBoxTimeoutW(IN HWND hWnd, IN LPCWSTR lpText,
     IN LPCWSTR lpCaption, IN UINT uType,
     IN WORD wLanguageId, IN DWORD dwMilliseconds);

 #ifdef UNICODE
     #define MessageBoxTimeout MessageBoxTimeoutW
 #else
     #define MessageBoxTimeout MessageBoxTimeoutA
 #endif

 #define MB_TIMEDOUT 32000

 int MessageBoxTimeoutA(HWND hWnd, LPCSTR lpText,
     LPCSTR lpCaption, UINT uType, WORD wLanguageId,
     DWORD dwMilliseconds)
 {
     static MSGBOXAAPI MsgBoxTOA = NULL;

     if (!MsgBoxTOA)
     {
         HMODULE hUser32 = GetModuleHandle(_T("user32.dll"));
         if (hUser32)
         {
             MsgBoxTOA = (MSGBOXAAPI)GetProcAddress(hUser32,
                                       "MessageBoxTimeoutA");
             //fall through to 'if (MsgBoxTOA)...'
         }
         else
         {
             //stuff happened, add code to handle it here
             //(possibly just call MessageBox())
             return ;
         }
     }

     if (MsgBoxTOA)
     {
         return MsgBoxTOA(hWnd, lpText, lpCaption,
               uType, wLanguageId, dwMilliseconds);
     }

     return ;
 }

 int MessageBoxTimeoutW(HWND hWnd, LPCWSTR lpText,
     LPCWSTR lpCaption, UINT uType, WORD wLanguageId, DWORD dwMilliseconds)
 {
     static MSGBOXWAPI MsgBoxTOW = NULL;

     if (!MsgBoxTOW)
     {
         HMODULE hUser32 = GetModuleHandle(_T("user32.dll"));
         if (hUser32)
         {
             MsgBoxTOW = (MSGBOXWAPI)GetProcAddress(hUser32,
                                       "MessageBoxTimeoutW");
             //fall through to 'if (MsgBoxTOW)...'
         }
         else
         {
             //stuff happened, add code to handle it here
             //(possibly just call MessageBox())
             return ;
         }
     }

     if (MsgBoxTOW)
     {
         return MsgBoxTOW(hWnd, lpText, lpCaption,
                uType, wLanguageId, dwMilliseconds);
     }

     return ;
 }
 //End required definitions <--
 //Call the function as follows:

 // Collapse
 //you must load user32.dll before calling the function
 main()
 {
     HMODULE hUser32 = LoadLibrary(_T("user32.dll"));

     if (hUser32)
     {
          int iRet = ;
          UINT uiFlags = MB_OK|MB_SETFOREGROUND|MB_SYSTEMMODAL|MB_ICONINFORMATION;

          iRet = MessageBoxTimeout(NULL, _T("Test a timeout of 2 seconds."),
                                  _T("MessageBoxTimeout Test"), uiFlags, , );
          //iRet will = 1

          uiFlags = MB_YESNO|MB_SETFOREGROUND|MB_SYSTEMMODAL|MB_ICONINFORMATION;

          iRet = MessageBoxTimeout(NULL, _T("Test a timeout of 5 seconds."),
                                  _T("MessageBoxTimeout Test"), uiFlags, , );
          //iRet will = MB_TIMEDOUT if no buttons pressed, button values otherwise

          //only unload user32.dll when you have no further need
          //for the MessageBoxTimeout function
          FreeLibrary(hUser32);
     }
 }