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2026-06-18

指定窗口查询内存信息 - VirtualQueryEx ​

函数简介 ​

查询指定的内存信息。

接口名称 ​

VirtualQueryEx

DLL调用 ​

long VirtualQueryEx(long instance, long hwnd, long addr, long pmbi);

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。
hwnd长整数型窗口句柄或进程ID。
addr长整数型要查询的内存地址。
pmbi长整数型内存信息结构体指针。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
std::string result = ola.VirtualQueryEx(hwnd, 0, 0);
csharp
using OLAPlug;

var ola = new OLAPlugServer();
string result = ola.VirtualQueryEx(hwnd, 0, 0);
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
result = ola.VirtualQueryEx(hwnd, 0, 0)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
String result = ola.VirtualQueryEx(hwnd, 0, 0);
cpp
var ola = com("OlaPlug.OlaSoft")
var result = ola.VirtualQueryEx(hwnd, 0, 0)
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
result = ola.VirtualQueryEx(hwnd, 0, 0)
text
.局部变量 ola, OLAPlug
ola.创建 ()
result ＝ ola.VirtualQueryEx(hwnd, 0, 0)
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var result = ola.VirtualQueryEx(hwnd, 0, 0);
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
文本型 result = ola.VirtualQueryEx(hwnd, 0, 0)
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
std::string result = ola.VirtualQueryEx(hwnd, 0, 0);

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
long ptr = VirtualQueryEx(instance, hwnd, 0, 0);
if (ptr != 0) {
    char buffer[512] = {0};
    GetStringFromPtr(ptr, buffer, sizeof(buffer));
    FreeStringPtr(ptr);
}
csharp
using System.Runtime.InteropServices;
using System.Text;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int GetStringFromPtr(long ptr, StringBuilder lpString, int size);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int FreeStringPtr(long ptr);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int GetStringSize(long ptr);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long VirtualQueryEx(long ola, long hwnd, long addr, long pmbi);

long instance = CreateCOLAPlugInterFace();
long ptr = VirtualQueryEx(instance, hwnd, 0, 0);
if (ptr != 0) {
    StringBuilder sb = new StringBuilder(GetStringSize(ptr) + 1);
    GetStringFromPtr(ptr, sb, sb.Capacity);
    FreeStringPtr(ptr);
    string result = sb.ToString();
}
python
from ctypes import CDLL, c_int, c_int64, create_string_buffer

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
ptr = ola.VirtualQueryEx(instance, hwnd, 0, 0)
if ptr:
    buf = create_string_buffer(512)
    ola.GetStringFromPtr(ptr, buf, 512)
    ola.FreeStringPtr(ptr)
    result = buf.value.decode("utf-8")

返回值 ​

返回值说明
（返回值）返回字符串的指针，内容为"BaseAddress,AllocationBase,AllocationProtect,RegionSize,State,Protect,Type"，数值都是10进制表达。

注意事项 ​

项目说明
释放内存返回的字符串指针需调用 FreeStringPtr 释放内存。

结构体定义如下：

c
// 32位
typedef struct _MEMORY_BASIC_INFORMATION32 {
    DWORD BaseAddress;
    DWORD AllocationBase;
    DWORD AllocationProtect;
    DWORD RegionSize;
    DWORD State;
    DWORD Protect;
    DWORD Type;
} MEMORY_BASIC_INFORMATION32;

// 64位
typedef struct DECLSPEC_ALIGN(16) _MEMORY_BASIC_INFORMATION64 {
    ULONGLONG BaseAddress;
    ULONGLONG AllocationBase;
    DWORD     AllocationProtect;
    DWORD     __alignment1;
    ULONGLONG RegionSize;
    DWORD     State;
    DWORD     Protect;
    DWORD     Type;
    DWORD     __alignment2;
} MEMORY_BASIC_INFORMATION64;