1. 如何激活当前屏幕保护程序
// 激活当前屏幕保护程序, jingzhou xu
PostMessage(WM_SYSCOMMAND,SC_SCREENSAVE,0);
2. 如何获取局域网上计算机名及它们的IP地址
l 连接ws2_32.lib和 mpr.lib库
l #include winsock2.h
CString strTemp; struct hostent *host; struct in_addr *ptr; // 检索IP地址 DWORD dwScope = RESOURCE_CONTEXT; NETRESOURCE *NetResource = NULL; HANDLE hEnum; WNetOpenEnum( dwScope, NULL, NULL, NULL, &hEnum ); WSADATA wsaData; WSAStartup(MAKEWORD(1,1),&wsaData); if ( hEnum ) { DWORD Count = 0xFFFFFFFF; DWORD BufferSize = 2048; LPVOID Buffer = new char[2048]; WNetEnumResource( hEnum, &Count, Buffer, &BufferSize ); NetResource = (NETRESOURCE*)Buffer; char szHostName[200]; unsigned int i; for ( i = 0; i < BufferSize/sizeof(NETRESOURCE); i++, NetResource++ ) { if ( NetResource->dwUsage == RESOURCEUSAGE_CONTAINER && NetResource->dwType == RESOURCETYPE_ANY ) { if ( NetResource->lpRemoteName ) { CString strFullName = NetResource->lpRemoteName; if ( 0 == strFullName.Left(2).Compare("") ) strFullName = strFullName.Right( strFullName.GetLength()-2); gethostname( szHostName, strlen( szHostName ) ); host = gethostbyname(strFullName); if(host == NULL) continue; ptr = (struct in_addr *) host->h_addr_list[0]; // =. 分隔开IP:211.40.35.76. int a = ptr->S_un.S_un_b.s_b1; // 211 int b = ptr->S_un.S_un_b.s_b2; // 40 int c = ptr->S_un.S_un_b.s_b3; // 35 int d = ptr->S_un.S_un_b.s_b4; // 76 strTemp.Format("%s --> %d.%d.%d.%d", strFullName,a,b,c,d); AfxMessageBox(strTemp); } } } delete Buffer; WNetCloseEnum( hEnum ); } WSACleanup();
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