在PALM中﹐每台PDA都有唯一的ID碼﹐我想在WINCE中也應該有類似的ID碼﹐但如何在程式中獲取該ID碼﹖
答案就是PPC沒有統一的Device ID
如果你為ipaq開發程式,那麼兩種方法可以取得device id:
1 Download Compaq iPAQ SDK 然後用 CPQInfoGetSerialNo function (定義在CPQInfo.h中)取得.
2 如果你隻想用通用SDK,那麼有一個取巧的辦法,就是運作/windows/CreateAssetFile.exe ,然後讀取自動生成的/windows/cpqAssetData.dat 檔案, DeviceID就在裡面, 這裡有一段程式專門幹這事:
*/
CString GetSerialNumber()
... {
// Start CreateAssetFile.exe
PROCESS_INFORMATION pi;
if (!::CreateProcess(TEXT("/windows/CreateAssetFile.exe"),
NULL, NULL, NULL, FALSE, 0, NULL, NULL, NULL, &pi))
...{
m_strCompaqIpaqId = _T("");
m_strErrorMessage += _T("Cannot run /windows/CreateAssetFile.exe file.");
return TEXT("");
}
// Wait until CreateAssetFile.exe will be finished
::WaitForSingleObject(pi.hProcess, INFINITE);
// Read data from cpqAssetData.dat file
HANDLE hInFile;
TCHAR strSN[65];
DWORD dwBytesRead;
hInFile = CreateFile(TEXT("/windows/cpqAssetData.dat"), GENERIC_READ,
FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
if (hInFile == INVALID_HANDLE_VALUE) ...{
m_strCompaqIpaqId = _T("");
m_strErrorMessage += _T("Cannot read /windows/cpqAssetData.dat file.");
return TEXT("");
}
SetFilePointer(hInFile, 976, NULL, FILE_BEGIN);
memset(strSN, 0, 64 * sizeof(TCHAR));
ReadFile(hInFile, &strSN, 64, &dwBytesRead, NULL);
CloseHandle(hInFile);
return CString(strSN);
}