windows中判斷註冊表鍵值是否存在的一段函數

下面這個函數用於判斷註冊表鍵值是否存在

bool IsRegValueExisted(HKEY hMainKey, LPCTSTR pSubKey, LPCTSTR pValName)
{
	bool bRet =false;
	DWORD dwType = REG_SZ;
	HKEY hKey;
	LSTATUS nRes = RegOpenKeyEx(hMainKey, pSubKey,	 
		0, KEY_READ,  &hKey);
	if (nRes != ERROR_SUCCESS) {
		return false;
	}
	nRes = RegQueryValueEx(hKey, pValName, NULL, &dwType, NULL, NULL)	;
	RegCloseKey(hKey);
	if (nRes == ERROR_SUCCESS || nRes ==ERROR_MORE_DATA) {
		bRet = true;
	}
	return bRet;
}

調用方式像這樣

IsRegValueExisted(HKEY_CURRENT_USER, 
		_T("Software\\Microsoft\\Windows\\CurrentVersion\\Run"), _T("CCUI")