C++ 代码加载E:\hid.dll该dll，并读取出该dll中所有函数-DPDK中文网

在 C++ 中加载 E:\hid.dll 并读取其所有导出函数，可以通过 Windows API（LoadLibrary + GetProcAddress）或 DbgHelp 库（解析 PE 文件结构）实现。以下是两种方法的完整代码示例：

方法一：使用 Windows API（简单但功能有限）

#include <windows.h>
#include <iostream>
#include <vector>

void ListDllFunctions(const char* dllPath) {
    // 1. 加载 DLL
    HMODULE hDll = LoadLibraryA(dllPath);
    if (!hDll) {
        std::cerr << "Failed to load DLL: " << GetLastError() << std::endl;
        return;
    }

    // 2. 获取导出表地址 (PE文件结构)
    PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)hDll;
    PIMAGE_NT_HEADERS pNtHeaders = (PIMAGE_NT_HEADERS)((BYTE*)hDll + pDosHeader->e_lfanew);
    PIMAGE_EXPORT_DIRECTORY pExportDir = (PIMAGE_EXPORT_DIRECTORY)((BYTE*)hDll +
        pNtHeaders->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);

    // 3. 读取函数名数组
    DWORD* pFunctions = (DWORD*)((BYTE*)hDll + pExportDir->AddressOfFunctions);
    DWORD* pNames = (DWORD*)((BYTE*)hDll + pExportDir->AddressOfNames);
    WORD* pOrdinals = (WORD*)((BYTE*)hDll + pExportDir->AddressOfNameOrdinals);

    std::cout << "Exported Functions in " << dllPath << ":\n";
    
    for (DWORD i = 0; i < pExportDir->NumberOfNames; i++) {
        const char* funcName = (const char*)((BYTE*)hDll + pNames[i]);
        std::cout << " - " << funcName << "\n";
    }

    // 4. 释放 DLL
    FreeLibrary(hDll);
}

int main() {
    ListDllFunctions("E:\\hid.dll");
}

方法二：使用 DbgHelp.lib（更可靠）

需链接 Dbghelp.lib，适合复杂场景：

#include <windows.h>
#include <dbghelp.h>
#include <iostream>

#pragma comment(lib, "Dbghelp.lib")

void ListFunctionsWithDbgHelp(const char* dllPath) {
    // 1. 加载 DLL
    HMODULE hModule = LoadLibraryExA(dllPath, NULL, 
                                    DONT_RESOLVE_DLL_REFERENCES | LOAD_LIBRARY_AS_DATAFILE);
    
	//2.获取导出表信息  
	ULONG size;
	PIMAGE_EXPORT_DIRECTORY exportTable =(PIMAGE_EXPORT_DIRECTORY)ImageDirectoryEntryToData(
		hModule,
		TRUE,
		IMAGE_DIRECTORY_ENTRY_EXPORT,
		&size);

	if(!exportTable){
	    std::cerr<<"No export table found!"<<std::endl;
	    return;
	}

	DWORD *names=(PDWORD)((LPBYTE)base+exportTable->AddressOfNames);  

	std::cout<<"Exported functions:"<<std::endl;

	for(DWORD i=0;i<exportTable->NumberOfNames;i++){
	    LPCSTR name=(LPCSTR)((LPBYTE)base+names[i]);  
	    std::cout<<name<<std::endl;  
     }
     
     FreeLibrary(hModule);   
}

int main(){
	ListFunctionsWithDbgHelp("E:\\hid.dll"); 
	return EXIT_SUCCESS;  
}