Windows レジストリから値を安全に読み取る方法: ステップバイステップ ガイド

<code class="cpp">LONG lRes = RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"SOFTWARE\Perl", 0, KEY_READ, &hKey);
if (lRes == ERROR_SUCCESS) {
  // Key exists
} else if (lRes == ERROR_FILE_NOT_FOUND) {
  // Key does not exist
}</code>

<code class="cpp">std::wstring strKeyDefaultValue;
GetStringRegKey(hKey, L"", strKeyDefaultValue, L"bad");</code>

<code class="cpp">std::wstring strValueOfBinDir;
GetStringRegKey(hKey, L"BinDir", strValueOfBinDir, L"bad");</code>

<code class="cpp">DWORD nValue;
LONG nError = GetDWORDRegKey(hKey, L"DWORD_Value_Name", nValue, 0);</code>

<code class="cpp">bool bValue;
LONG nError = GetBoolRegKey(hKey, L"BOOL_Value_Name", bValue, false);</code>