利用sendMessage实现进程间通信

来源 visual c++开发范例,IDE:vs2010. 分为 a.server(接收消息,显示接收到的数值). b.client（打开server进程,向server主窗体发送消息). //得到主窗口 HWND CMyJC006ClientDlg::GetServerMainWnd() { HWND hWnd; if(0==EnumWindows((WNDENUMPROC)EnumWndProc,(LPARAM)&hWnd)) //find { return hWnd; } return NULL; } //枚举窗口的回调函数 BOOL CALLBACK EnumWndProc(HWND hWnd,LPARAM lParam) { TCHAR szWndText[MAX_PATH]; unsigned long dwProcessID; GetWindowThreadProcessId(hWnd,&dwProcessID); if(dwProcessID==g_ProcessId) { if(NULL==::GetParent(hWnd)) //is top window { *(HWND*)lParam=hWnd; return FALSE; //means 0 } } return TRUE; } void CMyJC006ClientDlg::OnBnClickedButtonSend() { // TODO: 在此添加控件通知处理程序代码 //handle --wnd UpdateData(TRUE); //to var HWND hWnd=GetServerMainWnd(); if(hWnd==NULL) { AfxMessageBox(_T("获取MyJC006Server窗口句柄失败!")); ((CButton*)GetDlgItem(IDC_BUTTON_OPEN))->EnableWindow(TRUE); ((CButton*)GetDlgItem(IDC_BUTTON_SEND))->EnableWindow(FALSE); ((CEdit*)GetDlgItem(IDC_EDIT_SENDTEXT))->SetReadOnly(TRUE); return; } //进程ID-->主窗口句柄 CWnd *pWnd=CWnd::FromHandle (hWnd); //wonder 22,get句柄server窗体 pWnd->SendMessage (WM_TEXTMESSAGE,this->m_nTextMessage,0); }