On windows xp ,we can get the hotfix infos form HKEY_LOCAL_MACHINE,(“SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\HotFix”),but on windows 7 there is no that key. however we can get the hotfix infos from here”HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\”.Click here to down load the source code(not well written).lol
Source code here:
void CWindows7HotFixInfoDlg::OnBnClickedOk()
{
// TODO: 在此添加控件通知处理程序代码
//CDialogEx::OnOK();
TCHAR achKey[MAX_KEY_LENGTH]; // buffer for subkey name
DWORD cbName; // size of name string
TCHAR achClass[MAX_PATH] = TEXT(""); // buffer for class name
DWORD cchClassName = MAX_PATH; // size of class string
DWORD cSubKeys=0; // number of subkeys
DWORD cbMaxSubKey; // longest subkey size
DWORD cchMaxClass; // longest class string
DWORD cValues; // number of values for key
DWORD cchMaxValue; // longest value name
DWORD cbMaxValueData; // longest value data
DWORD cbSecurityDescriptor; // size of security descriptor
FILETIME ftLastWriteTime; // last write time
HKEY hKey;
DWORD i, retCode;
TCHAR achValue[MAX_VALUE_NAME];
DWORD cchValue = MAX_VALUE_NAME;
DWORD HotfixNumber = 0;
HotFix pFix;
BOOL bRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
_T("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Component Based Servicing\\Packages"),
0,
KEY_READ,
&hKey);
// Get the class name and the value count.
retCode = RegQueryInfoKey(
hKey, // key handle
achClass, // buffer for class name
&cchClassName, // size of class string
NULL, // reserved
&cSubKeys, // number of subkeys
&cbMaxSubKey, // longest subkey size
&cchMaxClass, // longest class string
&cValues, // number of values for this key
&cchMaxValue, // longest value name
&cbMaxValueData, // longest value data
&cbSecurityDescriptor, // security descriptor
&ftLastWriteTime); // last write time
// Enumerate the subkeys, until RegEnumKeyEx fails.
if (cSubKeys)
{
for (i=0; i
