bool KeyExists(WXHKEY hRootKey,
const wxString& szKey,
wxRegKey::WOW64ViewMode viewMode)
{
// don't close this key itself for the case of empty szKey!
if ( szKey.empty() )
return true;
HKEY hkeyDummy;
if ( ::RegOpenKeyEx
(
(HKEY)hRootKey,
szKey.t_str(),
RESERVED,
// we might not have enough rights for rw access
GetMSWAccessFlags(wxRegKey::Read, viewMode),
&hkeyDummy
) == ERROR_SUCCESS )
{
::RegCloseKey(hkeyDummy);
return true;
}
return false;
}
// opens key (it's not an error to call Open() on an already opened key)
bool wxRegKey::Open(AccessMode mode)
{
if ( IsOpened() )
{
if ( mode <= m_mode )
return true;
// we had been opened in read mode but now must be reopened in write
Close();
}
HKEY tmpKey;
m_dwLastError = ::RegOpenKeyEx
(
(HKEY) m_hRootKey,
m_strKey.t_str(),
RESERVED,
GetMSWAccessFlags(mode, m_viewMode),
&tmpKey
);
if ( m_dwLastError != ERROR_SUCCESS )
{
wxLogSysError(m_dwLastError, _("Can't open registry key '%s'"),
GetName().c_str());
return false;
}
m_hKey = (WXHKEY) tmpKey;
m_mode = mode;
return true;
}
// creates key, failing if it exists and !bOkIfExists
bool wxRegKey::Create(bool bOkIfExists)
{
// check for existence only if asked (i.e. order is important!)
if ( !bOkIfExists && Exists() )
return false;
if ( IsOpened() )
return true;
HKEY tmpKey;
DWORD disposition;
// Minimum supported OS for RegCreateKeyEx: Win 95, Win NT 3.1, Win CE 1.0
m_dwLastError = RegCreateKeyEx((HKEY) m_hRootKey, m_strKey.t_str(),
0, // reserved and must be 0
NULL, // The user-defined class type of this key.
REG_OPTION_NON_VOLATILE, // supports other values as well; see MS docs
GetMSWAccessFlags(wxRegKey::Write, m_viewMode),
NULL, // pointer to a SECURITY_ATTRIBUTES structure
&tmpKey,
&disposition);
if ( m_dwLastError != ERROR_SUCCESS ) {
wxLogSysError(m_dwLastError, _("Can't create registry key '%s'"),
GetName().c_str());
return false;
}
else
{
m_hKey = (WXHKEY) tmpKey;
return true;
}
}
