C / C++ / MFC

<br />
<br />
HHOOK hMsgBoxHook;<br />
void MsgBoxEnc(void);<br />
LRESULT CALLBACK CBTProc(int nCode, WPARAM wParam, LPARAM lParam);<br />
int MsgBoxEx(HWND hwnd, TCHAR *szText, TCHAR *szCaption, UINT uType);<br />
<br />
void main(void){     //just for sake of argument<br />
     printf("the stuff printed in my program");<br />
     MsgBoxEnc();<br />
     //bunch of stuff happens<br />
     MsgBoxEnc();<br />
}//end main<br />
<br />
LRESULT CALLBACK CBTProc(int nCode, WPARAM wParam, LPARAM lParam)<br />
{<br />
     TCHAR ach[40];<br />
     HWND hwnd;<br />
     HWND hwndButton;<br />
<br />
if(nCode < 0) return CallNextHookEx(hMsgBoxHook, nCode, wParam, lParam);<br />
     switch(nCode){<br />
          case HCBT_ACTIVATE:<br />
          hwnd = (HWND)wParam;<br />
          SetWindowText(hwnd, _T("Message from Creator"));<br />
          hwndButton = GetDlgItem(hwnd, IDOK);<br />
          SetWindowText(hwndButton, _T("OK"));<br />
          return 0;<br />
     }<br />
     return CallNextHookEx(hMsgBoxHook, nCode, wParam, lParam);<br />
}<br />
<br />
int MsgBoxEx(HWND hwnd, TCHAR *szText, TCHAR *szCaption, UINT uType)<br />
{<br />
     int retval;<br />
     hMsgBoxHook = SetWindowsHookEx(<br />
     WH_CBT,<br />
     CBTProc,<br />
     NULL,<br />
     GetCurrentThreadId()  );<br />
<br />
     retval = MessageBox(hwnd, szText, szCaption, uType);<br />
     UnhookWindowsHookEx(hMsgBoxHook);<br />
     return retval;<br />
}<br />
<br />
void MsgBoxEnc(void){<br />
     TCHAR szContents[] = _T("File Encoding is now Complete");<br />
     TCHAR szTitle[]    = _T("File Status");<br />
     MsgBoxEx(NULL, szContents, szTitle, MB_OK | MB_ICONEXCLAMATION);<br />
}<br />