C / C++ / MFC

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#define	AUDIT_KEY	_T("Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall")<br />
#define	AUDIT_KEY_LEN	256<br />
#define AUDIT_DISPLAY	_T("DisplayName")<br />
<br />
// Build a list of installed applications by enumerating<br />
	//	HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall<br />
	//	and fetching "DisplayName" entry<br />
<br />
	HKEY hKey;<br />
	if (::RegOpenKeyEx(HKEY_LOCAL_MACHINE, AUDIT_KEY, 0, KEY_READ, &hKey) != ERROR_SUCCESS)<br />
		return;<br />
<br />
	// List of strings<br />
	CStringList list;<br />
<br />
	DWORD dwIndex = 0;<br />
	LONG lRet;<br />
	DWORD cbName = AUDIT_KEY_LEN;<br />
	TCHAR szSubKeyName[AUDIT_KEY_LEN];<br />
	<br />
	while ((lRet = ::RegEnumKeyEx(hKey, dwIndex, szSubKeyName, &cbName, NULL,<br />
		NULL, NULL, NULL)) != ERROR_NO_MORE_ITEMS)<br />
	{<br />
		// Do we have a key to open?<br />
		if (lRet == ERROR_SUCCESS)<br />
		{<br />
			// Open the key and get the value<br />
			HKEY hItem;<br />
			if (::RegOpenKeyEx(hKey, szSubKeyName, 0, KEY_READ, &hItem) != ERROR_SUCCESS)<br />
				continue;<br />
			// Opened - look for "DisplayName"<br />
			TCHAR szDisplayName[AUDIT_KEY_LEN];<br />
			DWORD dwSize = sizeof(szDisplayName);<br />
			DWORD dwType;<br />
<br />
			if (::RegQueryValueEx(hItem, AUDIT_DISPLAY, NULL, &dwType,<br />
				(LPBYTE)&szDisplayName, &dwSize) == ERROR_SUCCESS)<br />
			{<br />
				// Add to the list<br />
				list.AddTail(szDisplayName);<br />
			}<br />
			::RegCloseKey(hItem);<br />
		}<br />
		dwIndex++;<br />
		cbName = AUDIT_KEY_LEN;<br />
	}<br />
	::RegCloseKey(hKey);<br />