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2026-06-18

读取字符串值 - RegistryGetString ​

函数简介 ​

读取字符串类型的注册表值（REG_SZ/REG_EXPAND_SZ）。

接口名称 ​

RegistryGetString

DLL调用 ​

cpp
int64_t RegistryGetString(int64_t instance, int64_t key, const char* valueName);

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。
key长整数型注册表键句柄，由 RegistryOpenKey 或 RegistryCreateKey 返回。
valueName字符串值名称，空字符串表示读取默认值。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
// rootKey=1 表示 HKEY_CURRENT_USER
long key = ola.RegistryOpenKey(1, "Software\\OLAPlug");
if (key != 0) {
    std::string version = ola.RegistryGetString(key, "Version");
    ola.RegistryCloseKey(key);
}
csharp
using OLAPlug;

var ola = new OLAPlugServer();
long key = ola.RegistryOpenKey(1, @"Software\OLAPlug");
if (key != 0)
{
    string version = ola.RegistryGetString(key, "Version");
    ola.RegistryCloseKey(key);
}
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
key = ola.RegistryOpenKey(1, r"Software\OLAPlug")
if key != 0:
    version = ola.RegistryGetString(key, "Version")
    ola.RegistryCloseKey(key)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
long key = ola.RegistryOpenKey(1, "Software\\OLAPlug");
if (key != 0) {
    String version = ola.RegistryGetString(key, "Version");
    ola.RegistryCloseKey(key);
}
cpp
var ola = com("OlaPlug.OlaSoft")
var key = ola.RegistryOpenKey(1, "Software\\OLAPlug")
if(key) {
    var version = ola.RegistryGetString(key, "Version")
    ola.RegistryCloseKey(key)
}
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
key = ola.RegistryOpenKey(1, "Software\OLAPlug")
If key <> 0 Then
    version = ola.RegistryGetString(key, "Version")
    ola.RegistryCloseKey(key)
End If
text
.局部变量 ola, OLAPlug
ola.创建 ()
key ＝ ola.RegistryOpenKey (1, “Software\\OLAPlug“)
.如果真 (key ≠ 0)
    version ＝ ola.RegistryGetString (key, "Version")
    ola.RegistryCloseKey (key)
.如果真结束
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var key = ola.RegistryOpenKey(1, "Software\\OLAPlug");
if(key){
    var version = ola.RegistryGetString(key, "Version");
    ola.RegistryCloseKey(key);
}
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
长整数 key = ola.RegistryOpenKey(1, "Software\\OLAPlug")
如果真 (key ≠ 0)
{
    文本型 version = ola.RegistryGetString(key, "Version")
    ola.RegistryCloseKey(key)
}
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long key = ola.RegistryOpenKey(1, "Software\\OLAPlug");
if (key != 0) {
    std::string version = ola.RegistryGetString(key, "Version");
    ola.RegistryCloseKey(key);
}

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
long key = RegistryOpenKey(instance, 1, "Software\\OLAPlug");
if (key != 0) {
    long ptr = RegistryGetString(instance, key, "Version", 0);
    RegistryCloseKey(instance, key);
}
csharp
using System.Runtime.InteropServices;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();

long instance = CreateCOLAPlugInterFace();
long key = RegistryOpenKey(instance, 1, @"Software\OLAPlug");
if (key != 0)
{
    RegistryGetString(instance, key, "Version", 0);
    RegistryCloseKey(instance, key);
}
python
from ctypes import CDLL, c_int, c_int64

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
key = ola.RegistryOpenKey(instance, 1, b"Software\\OLAPlug")
if key:
    ptr = ola.RegistryGetString(instance, key, b"Version", 0)
    ola.RegistryCloseKey(instance, key)

返回值 ​

返回值说明
（返回值）长整数型。成功返回字符串内容的指针（非0值），失败或不存在返回 0。返回的字符串指针需调用 FreeStringPtr 释放内存。

注意事项 ​

项目说明
key 参数必须是有效的注册表键句柄key 参数必须是有效的注册表键句柄，通常由 RegistryOpenKey 或 RegistryCreateKey 获得。
读取完成后需调用 [RegistryCloseK读取完成后需调用 RegistryCloseKey 释放句柄。
默认值空字符串作为值名称表示读取默认值。
支持读取 REG_SZ 和 REG_EXPAND支持读取 REG_SZ 和 REG_EXPAND_SZ 类型。
如果值类型不是字符串类型如果值类型不是字符串类型，将返回 0。