VC利用FindWindow進程和消息間通信

      

               COPYDATASTRUCT cpd;

CString   m_szData = _T("hearbeat");
cpd.dwData = REGION_SERVER_PRO_ID;
cpd.cbData = m_szData.GetLength() + 1;//GetLength()只是取得實際字符的長度，沒有包括'\0'.
cpd.lpData = (void*)m_szData.GetBuffer(cpd.cbData);
HWND hWndRcv = ::FindWindow(NULL,WATCHDOG_PRO_WINDOW_TITLE);
if(hWndRcv)

::SendMessage(hWndRcv,WM_COPYDATA,(WPARAM)this->m_hWnd,(LPARAM)&cpd); 

響應WM_COPYDATA消息

BOOL CRegionMgrDlg::OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct) 
{
if((pCopyDataStruct->dwData&0xffff) == ALARM_QUERY_ID)
{
const char* szData = (const char*)pCopyDataStruct->lpData;
}
else if((pCopyDataStruct->dwData&0xffff) == WATCHDOG_PRO_ID)
{
if (strcmp((char*)pCopyDataStruct->lpData, "switchConsole")==0)//打開或半閉Console控制檯消息
{
g_LogFile.switchCmdWindow();
}
else if (strcmp((char*)pCopyDataStruct->lpData, "exit")==0)//退出消息
{
g_WorkingState = FALSE;
// if(m_pMLsnThread == NULL)
// {
// if(sockMsgSrv != SOCKET_ERROR)///有效SOCKET要先關閉
// MyCloseSocket(sockMsgSrv);
//
// TerminateThread(m_pMLsnThread->m_hThread,0);
// }
// SetTimer(104, 100, NULL);//開啓定時器，檢查所有數據是否處理完畢
//CDialog::OnClose();
   exit(0);
}
else
{
;
}
}
else if((pCopyDataStruct->dwData&0xffff) == REGION_SERVER_PRO_ID) //爲本程序的消息
{
if (strcmp((char*)pCopyDataStruct->lpData, "restart")==0)//重啓消息
{
COPYDATASTRUCT cpd;
CString   m_szData = _T("restart");
cpd.dwData = REGION_SERVER_PRO_ID;
cpd.cbData = m_szData.GetLength() + 1;//GetLength()只是取得實際字符的長度，沒有包括'\0'.
cpd.lpData = (void*)m_szData.GetBuffer(cpd.cbData);
HWND hWndRcv = ::FindWindow(NULL,WATCHDOG_PRO_WINDOW_TITLE);
if(hWndRcv)
::SendMessage(hWndRcv,WM_COPYDATA,(WPARAM)this->m_hWnd,(LPARAM)&cpd); 
else
StartWatchDog();
}
}
else
{
;
}
return CDialog::OnCopyData(pWnd, pCopyDataStruct);
}