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2026-06-30

判断注册表键是否存在 - RegistryKeyExists ​

函数简介 ​

判断指定的注册表键是否存在。

接口名称 ​

RegistryKeyExists

DLL调用 ​

cpp
int32_t RegistryKeyExists(int64_t instance, int32_t rootKey, const char* subKey);

参数说明 ​

参数名类型说明
instance长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
rootKey整数型根键类型：0 HKEY_CLASSES_ROOT、1 HKEY_CURRENT_USER、2 HKEY_LOCAL_MACHINE、3 HKEY_USERS、4 HKEY_CURRENT_CONFIG。
subKey字符串子键路径。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
int exists = ola.RegistryKeyExists(1, "Software\\OLAPlug");
if (exists == 1) {
    long key = ola.RegistryOpenKey(1, "Software\\OLAPlug");
    ola.RegistryCloseKey(key);
}
csharp
using OLAPlug;

var ola = new OLAPlugServer();
int exists = ola.RegistryKeyExists(1, @"Software\OLAPlug");
if (exists == 1)
{
    long key = ola.RegistryOpenKey(1, @"Software\OLAPlug");
    ola.RegistryCloseKey(key);
}
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
exists = ola.RegistryKeyExists(1, r"Software\OLAPlug")
if exists == 1:
    key = ola.RegistryOpenKey(1, r"Software\OLAPlug")
    ola.RegistryCloseKey(key)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
int exists = ola.RegistryKeyExists(1, "Software\\OLAPlug");
go
import "github.com/ola/olaplug/olaplug"

ola, _ := olaplug.NewOLAPlugServer("OLAPlug_x64.dll")
defer ola.ReleaseObj()
exists := ola.RegistryKeyExists(1, "Software\\OLAPlug")
if exists == 1 {
    key := ola.RegistryOpenKey(1, "Software\\OLAPlug")
    ola.RegistryCloseKey(key)
}
rust
use olaplug::OLAPlugServer;

let ola = OLAPlugServer::new("OLAPlug_x64.dll").unwrap();
let exists = ola.registry_key_exists(1, "Software\\OLAPlug");
if exists == 1 {
    let key = ola.registry_open_key(1, "Software\\OLAPlug");
    ola.registry_close_key(&key);
}
cpp
var ola = com("OlaPlug.OlaSoft")
var exists = ola.RegistryKeyExists(1, "Software\\OLAPlug")
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
exists = ola.RegistryKeyExists(1, "Software\OLAPlug")
text
.局部变量 ola, OLAPlug
ola.创建 ()
exists ＝ ola.RegistryKeyExists (1, “Software\\OLAPlug“)
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var exists = ola.RegistryKeyExists(1, "Software\\OLAPlug");
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
整数 exists = ola.RegistryKeyExists(1, "Software\\OLAPlug")
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
int32_t exists = ola.RegistryKeyExists(1, "Software\\OLAPlug");

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
int exists = RegistryKeyExists(instance, 1, "Software\\OLAPlug");
csharp
using System.Runtime.InteropServices;
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();

long instance = CreateCOLAPlugInterFace();
int exists = RegistryKeyExists(instance, 1, @"Software\OLAPlug");
python
from ctypes import CDLL, c_int, c_int64

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
exists = ola.RegistryKeyExists(instance, 1, b"Software\\OLAPlug")

返回值 ​

返回值说明
（返回值）整数型。1 存在，0 不存在。

注意事项 ​

项目说明
此函数仅判断键是否存在此函数仅判断键是否存在，不打开键。
可用于在创建或打开键之前进行检查可用于在创建或打开键之前进行检查。