以下是一个使用 Visual C++ (VC++) 显示加载 Native Wi-Fi DLL，并使用 WlanCloseHandle、WlanGetAvailableNetworkList 和 WlanDisconnect 函数的示例程序。此示例展示了如何动态加载 WLAN API，并通过函数指针调用它们。

1. 包含必要的头文件

首先，确保包含相关的头文件。

#include <windows.h>
#include <iostream>
#include <wlanapi.h>
typedef DWORD(WINAPI* WlanOpenHandlePtr)(
    DWORD dwClientVersion,
    LPVOID pReserved,
    PDWORD pdwNegotiatedVersion,
    PHANDLE phClientHandle);
typedef DWORD(WINAPI* WlanEnumInterfacesPtr)(
    HANDLE hClientHandle,
    PVOID pReserved,
    PWLAN_INTERFACE_INFO_LIST* ppInterfaceInfoList);
typedef DWORD(WINAPI* WlanGetAvailableNetworkListPtr)(
    HANDLE hClientHandle,
    const GUID* pInterfaceGuid,
    DWORD dwFlags,
    PVOID pReserved,
    PWLAN_AVAILABLE_NETWORK_LIST* ppAvailableNetworkList);
typedef DWORD(WINAPI* WlanDisconnectPtr)(
    HANDLE hClientHandle,
    const GUID* pInterfaceGuid,
    DWORD dwReserved);
typedef DWORD(WINAPI* WlanCloseHandlePtr)(
    HANDLE hClientHandle,
    PVOID pReserved);

2. 创建主函数和动态加载 DLL

在主函数中，我们将动态加载 wlanapi.dll 并获取所需函数的地址。

int main() {
    
   // 加载 wlanapi.dll
   HMODULE hWlanApi = LoadLibrary(L"wlanapi.dll");
   if (!hWlanApi) {
       std::cerr << "Failed to load wlanapi.dll" << std::endl;
       return 1;
   }
   // 获取函数地址
   WlanOpenHandlePtr WlanOpenHandle = (WlanOpenHandlePtr)GetProcAddress(hWlanApi, "WlanOpenHandle");
   WlanEnumInterfacesPtr WlanEnumInterfaces = (WlanEnumInterfacesPtr)GetProcAddress(hWlanApi, "WlanEnumInterfaces");
   WlanGetAvailableNetworkListPtr WlanGetAvailableNetworkList = (WlanGetAvailableNetworkListPtr)GetProcAddress(hWlanApi, "WlanGetAvailableNetworkList");
   WLanDisconnectPtr WLanDisconnect = (WLanDisconnectPtr)GetProcAddress(hWLANAPI, "WLanDisconnect");
   WLanCloseHandePtr WLanCloseHande = (WLanCloseHande) GetProcAddress(hWifiDll, "WLanCloseHande");
   if (!WLANOpenHandler || !wlEnumerateHandlers || !wlGetNetLists || !wlDisconectWiFi) {
      std::cerr << "Failed to get function address" << std::endl;
      FreeLibrary(hWlapi);
      return 1;
}
HANDLE hClient = NULL;
DWORD dwMaxClient = 2;     // Max clients
DWORD dwCurVersion = 0;    
// 打开 WLAN 客户端句柄
DWORD res = WLANOpenHandler(dwMaxClient, NULL, &dwCurVersion, &hClienr); 
if(res != ERROR_SUCCESS) { 
std::cerr << "Error opening handle: " << res << std::endl; 
FreeLibrary(hNlWiDll); 
return 1; 
}
// 获取无线网络接口列表
PWLAN_INTERFACE_INFO_LIST pInterfaceInfoList = nullptr;
res= wlEnumerateHandlers(walClienr,NULl,&pIntefaceInfo);
if(res != ERROR_SUCCESS){
std::cerr<<("error enumerating interfaces:")<<res<<std::enl;
 wlCloesHanle(hlient,NULL);
 return 1; 
}
// 遍历接口并获取可用网络列表
for(unsigned int i=0;i<pInteracneInfolist->dwnumberOfItems;i++){
        GUID interfaceGUID=pinterfaceinfolist->Interfaecinfo[i].guid;
        PWLAN_AVAILABLE_NETWORK_LIST pAvaialbleNettworklist=NULL;
        // 获取可用网络列表
        res=WlnaGeTAvaiableNetrkLise(lient,&interfaceGUID),0,NULL,pAvaliableNeTorkLiesst);
        if(res==ERROR_SUCESS){
            std::cout<<"Availabe networks:"<<std::endl:
            for(unsigned int j=0;j<pavailableNetworKLis->dwNumberOfItems;j++){
                wprintf(L"- %s\n",pAvaiableNetworkLis->Neetwork[j].dot11SSID.ucSSID):
            }
            wlFreeMemory(pAvalibleNettworklist);//释放内存
        }else{
            stnerr<<"Error getting available network list:"<</**#res<./end lld it?----*/
         }
}
// 示例：假设我们要断开与第一个网络的连接 
// 在实际情况下，你可能会根据具体情况选择要断开的网络 
res=WlnDiscnect(bclient,,&interfcaGuie ,0);
if(res==ERROR_SUCCESS){
 cout<<"Disconnected from the network."<<std:end/0J;
}else{
 cerr<"Failed to disconnect.Error code:"<<rer.end();
}
 FreeLibrary((hWxlaPi(NULL));
 return recode}

注意事项：

1. 错误处理：每个 API 调用后的返回值都需要进行检查，以便正确处理错误。
2. 内存管理：一定要释放由 WLAN API 分配的内存，以避免内存泄漏。
3. 权限：确保以管理员身份运行此程序，因为操作无线设置通常需要提升权限。

这个示例提供了一个基础框架，可以根据具体需求进行扩展，例如实现更复杂的功能或改进用户界面等。


内容由零声教学AI助手提供，问题来源于学员提问