Windows下獲取設備管理器列表信息-setupAPI

背景及問題：

示例程序

#include<Windows.h>
#include<SetupAPI.h>
#include<iostream>
#include<string>
#pragma comment(lib, "setupapi.lib")

int main()
{
	//set chinese character
	std::locale::global(std::locale(""));

	//The SetupDiGetClassDevs function returns a handle to a device 
    //information set that contains requested device information 
    //elements for a local computer.
	HDEVINFO hdevinfo = SetupDiGetClassDevs(NULL,
		NULL, NULL, DIGCF_PRESENT | DIGCF_ALLCLASSES);
	if (hdevinfo != INVALID_HANDLE_VALUE)
	{
		DWORD MemberIndex = 0;
		SP_DEVINFO_DATA sp_devinfo_data;
		ZeroMemory(&sp_devinfo_data, sizeof(sp_devinfo_data));
		sp_devinfo_data.cbSize = sizeof(sp_devinfo_data);

        //The SetupDiEnumDeviceInfo function returns a SP_DEVINFO_DATA 
        //structure that specifies a device information element in a 
        //device information set.
		while (SetupDiEnumDeviceInfo(hdevinfo, MemberIndex, &sp_devinfo_data))
		{
			TCHAR PropertyBuffer[100];

        	//The SetupDiGetDeviceRegistryProperty function retrieves
			//a specified Plug and Play device property.    
			if (SetupDiGetDeviceRegistryProperty(hdevinfo,
				&sp_devinfo_data,
				SPDRP_DEVICEDESC,
				NULL,
				(PBYTE)&PropertyBuffer,
				sizeof(PropertyBuffer),
				NULL))
			{

				std::wcout << MemberIndex << ":" << (wchar_t*)PropertyBuffer << std::endl;

			}
			MemberIndex++;

		}

	}
	return 0;
}

解釋

其中SetupDiGetClassDevs定義如下

WINSETUPAPI HDEVINFO SetupDiGetClassDevsW(
  [in, optional] const GUID *ClassGuid,
  [in, optional] PCWSTR     Enumerator,
  [in, optional] HWND       hwndParent,
  [in]           DWORD      Flags
);

拿到設備信息集合之后，使用SetupDiEnumDeviceInfo進行單個設備信息的解析

WINSETUPAPI BOOL SetupDiEnumDeviceInfo(
  [in]  HDEVINFO         DeviceInfoSet,
  [in]  DWORD            MemberIndex,
  [out] PSP_DEVINFO_DATA DeviceInfoData
);

WINSETUPAPI BOOL SetupDiGetDeviceRegistryPropertyW(
  [in]            HDEVINFO         DeviceInfoSet,
  [in]            PSP_DEVINFO_DATA DeviceInfoData,
  [in]            DWORD            Property,
  [out, optional] PDWORD           PropertyRegDataType,
  [out, optional] PBYTE            PropertyBuffer,
  [in]            DWORD            PropertyBufferSize,
  [out, optional] PDWORD           RequiredSize
);