远程控制技术在现代生活中扮演着越来越重要的角色，无论是在家庭、工作还是学习环境中，经常需要远程访问和操作设备。本文将介绍如何通过无线或有线方式远程控制Windows Mobile设备，包括屏幕捕获、压缩和传输到桌面应用程序的详细步骤和代码示例。
市场上销售的大多数远程应用程序的核心思想都是捕获移动设备或桌面的屏幕，然后通过网络发送到远程设备。本文将展示如何实现这一过程，包括如何使用套接字技术在移动设备和桌面之间传输数据，以及如何使用Zlib库压缩文件。
如果对Windows Mobile开发感兴趣，或者想要了解如何在移动设备和桌面上使用套接字技术，以及如何使用Zlib库进行文件压缩，那么本文将为提供宝贵的信息和指导。
在客户端，首先需要初始化Winsock2库，并创建一个套接字。以下是初始化Winsock2库的代码示例：
wVersionRequested = MAKEWORD(2, 0);
Status = WSAStartup(wVersionRequested, &wsaData);
if (Status != 0) {
ShowErr(TEXT("WSAStartup call failed!!, Error %d\r\n"), WSAGetLastError());
return;
}
接下来，需要创建一个套接字，并将其绑定到特定的服务提供商。以下是创建套接字的代码示例：
Sock = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (Sock == INVALID_SOCKET) {
MessageBox(TEXT("Error: failed to create socket\n"), MB_OK);
fflush(0);
return;
}
然后，需要准备服务器套接字，即检测IP地址和端口号，然后尝试连接到服务器。以下是准备服务器套接字的代码示例：
m_ServerSockAddr.sin_addr.s_addr = dwIPAddress;
m_ServerSockAddr.sin_family = AF_INET;
m_ServerSockAddr.sin_port = htons(987);
成功连接到服务器后，将使用GDI函数捕获屏幕。以下是捕获屏幕的代码示例：
HDC hdcScreen = CreateDC(L"DISPLAY", NULL, NULL, NULL);
HDC hdcCapture = CreateCompatibleDC(hdcScreen);
int nWidth = GetDeviceCaps(hdcScreen, HORZRES), nHeight = GetDeviceCaps(hdcScreen, VERTRES), nBPP = GetDeviceCaps(hdcScreen, BITSPIXEL);
LPBYTE lpCapture;
BITMAPINFO bmiCapture = { { sizeof(BITMAPINFOHEADER), nWidth, -(nHeight), 1, 24, BI_RGB, 0, 0, 0, 0, 0 } };
HBITMAP hbmCapture = CreateDIBSection(hdcScreen, &bmiCapture, DIB_RGB_COLORS, (LPVOID *)&lpCapture, NULL, 0);
int nCapture = SaveDC(hdcCapture);
SelectObject(hdcCapture, hbmCapture);
StretchBlt(hdcCapture, 0, 0, (nWidth), (nHeight), hdcScreen, 0, 0, nWidth, nHeight, SRCCOPY);
RestoreDC(hdcCapture, nCapture);
DeleteDC(hdcCapture);
DeleteDC(hdcScreen);
int nResult = SaveFileJPEG(lpszFilename, nQuality, (JSAMPLE *)lpCapture, nWidth, nHeight);
DeleteObject(hbmCapture);
接下来，将使用Zlib库压缩捕获的屏幕，并将其保存为JPEG文件。以下是压缩和保存JPEG文件的代码示例：
SaveFileJPEG(char *filename, int quality, JSAMPLE *buffer, int width, int height) {
struct jpeg_compress_struct jcompress;
struct jpeg_error_mgr jerror;
JSAMPROW scanline[1];
FILE *outfile;
memset(&jcompress, 0, sizeof(jcompress));
memset(&jerror, 0, sizeof(jerror));
jcompress.err = jpeg_std_error(&jerror);
jpeg_create_compress(&jcompress);
outfile = fopen(filename, "wb");
if (!outfile) return 1;
jpeg_stdio_dest(&jcompress, outfile);
jcompress.image_width = width;
jcompress.image_height = height;
jcompress.input_components = 3;
jcompress.in_color_space = JCS_RGB;
jpeg_set_defaults(&jcompress);
jpeg_set_quality(&jcompress, quality, TRUE);
jpeg_start_compress(&jcompress, TRUE);
int nStride = width * 3;
int nSize = nStride * height;
for (int i = 2; i < nSize; i += 3) {
unsigned char nTemp = buffer[i - 2];
buffer[i - 2] = buffer[i];
buffer[i] = nTemp;
}
while (jcompress.next_scanline < height) {
scanline[0] = buffer;
jpeg_write_scanlines(&jcompress, scanline, 1);
buffer += nStride;
}
jpeg_finish_compress(&jcompress);
jpeg_destroy_compress(&jcompress);
fclose(outfile);
return 0;
}
最后，将通过套接字发送文件。以下是发送文件的代码示例：
pThis->GetScreeny("\\Windows\\1.jpeg", 20);
CFile bmpFile(L"\\Windows\\1.jpeg", CFile::typeBinary | CFile::modeRead);
char *bmpBuf;
unsigned int fileLen = bmpFile.GetLength();
if (fileLen != oldFileSize) {
oldFileSize = fileLen;
bmpBuf = new char[fileLen];
bmpFile.Read(bmpBuf, fileLen);
DWORD nBytestoSend = sizeof(MESSAGEHEAD);
m_msgHead.nImageFileSize = fileLen;
send(Sock, (char *)&m_msgHead, nBytestoSend, 0);
int nSend = send(Sock, bmpBuf, fileLen, 0);
}
在服务器端，首先需要初始化Winsock，并创建一个套接字。以下是初始化Winsock的代码示例：
WORD VersionRequested = MAKEWORD(2, 2);
WSADATA wsaData;
WSAStartup(VersionRequested, &wsaData);
if (wsaData.wVersion != VersionRequested) {
MessageBox(TEXT("Wrong version or WinSock not loaded\n"), MB_OK);
fflush(0);
}
接下来，需要创建一个套接字，并将其绑定到特定的IP地址和端口号。以下是创建套接字的代码示例：
m_Socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (m_Socket == INVALID_SOCKET) {
MessageBox(TEXT("Error: failed to create socket\n"), MB_OK);
fflush(0);
return false;
}
m_ServerSockAddr.sin_family = AF_INET;
m_ServerSockAddr.sin_addr.s_addr = htonl(INADDR_ANY);
m_ServerSockAddr.sin_port = htons(987);
然后，需要绑定套接字，并使其处于监听状态。以下是绑定套接字和监听的代码示例：
if (bind(m_Socket, (struct sockaddr *)&m_ServerSockAddr, sizeof(m_ServerSockAddr)) != 0) {
MessageBox(TEXT("Error: failed to bind\n"), MB_OK);
closesocket(m_Socket);
return false;
}
if (listen(m_Socket, SOMAXCONN) != 0) {
MessageBox(TEXT("Error: failed to Listen\n"), MB_OK);
closesocket(m_Socket);
return false;
}
// Initialize the WinSock Stuff...
WSADATA wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
if (wsaData.wVersion != MAKEWORD(2, 2)) {
MessageBox(TEXT("Winsock version not supported\n"), MB_OK);
return FALSE;
}
// create socket function we discuss what this function mean
SOCKET m_Socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (m_Socket == INVALID_SOCKET) {
MessageBox(TEXT("Error: failed to create socket\n"), MB_OK);
return FALSE;
}
// To Crate Socket listen from any Client you can change it, by detect IP
SOCKADDR_IN m_ServerSockAddr;
m_ServerSockAddr.sin_family = AF_INET;
m_ServerSockAddr.sin_addr.s_addr = htonl(INADDR_ANY);
m_ServerSockAddr.sin_port = htons(987);
if (bind(m_Socket, (struct sockaddr *)&m_ServerSockAddr, sizeof(m_ServerSockAddr)) != 0) {
MessageBox(TEXT("Error: failed to bind\n"), MB_OK);
closesocket(m_Socket);
return FALSE;
}
if (listen(m_Socket, SOMAXCONN) != 0) {
MessageBox(TEXT("Error: failed to Listen\n"), MB_OK);
closesocket(m_Socket);
return FALSE;
}
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