获取系统所有电源计划策略名称及当前电源计划

使用C语言获取系统中所有的电源计划策回略。一般会有多个，但只会有一个当前有效。可通过设置来切换选择那个电源策回略。

#include <Windows.h>
#include <PowrProf.h>
#include <stdio.h>
#include <tchar.h>
#include <locale.h>
#pragma comment(lib, "PowrProf.lib")

int main()
{
    UINT index = 0;
    DWORD bufferSize = sizeof(GUID);
    GUID buffer;
    setlocale(LC_ALL, "chs");

    while (PowerEnumerate(NULL, NULL, NULL, ACCESS_SCHEME, index, (UCHAR*)&buffer, &bufferSize) == ERROR_SUCCESS)
    {
        TCHAR Name[512] = { 0 };
        DWORD len = sizeof(Name);
        if (PowerReadFriendlyName(NULL, &buffer, NULL, NULL, (PUCHAR)Name, &len) == ERROR_SUCCESS)
        {
            _tprintf(TEXT("%s \t"), Name);
        }
        printf("Power Plan GUID: %08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X \n",
            buffer.Data1, buffer.Data2, buffer.Data3,
            buffer.Data4[0], buffer.Data4[1], buffer.Data4[2], buffer.Data4[3],
            buffer.Data4[4], buffer.Data4[5], buffer.Data4[6], buffer.Data4[7]);


        index++;
        bufferSize = sizeof(GUID);
    }


    printf("------------------\n");

    GUID* ActivePolicyGuid = NULL;
    DWORD status =  PowerGetActiveScheme(
        NULL,
        &ActivePolicyGuid
    );
    if (status == ERROR_SUCCESS)
    {
        printf("Active Plan GUID: %08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
        ActivePolicyGuid->Data1, ActivePolicyGuid->Data2, ActivePolicyGuid->Data3,
             ActivePolicyGuid->Data4[0], ActivePolicyGuid->Data4[1],  ActivePolicyGuid->Data4[2], ActivePolicyGuid->Data4[3],
             ActivePolicyGuid->Data4[4], ActivePolicyGuid->Data4[5],  ActivePolicyGuid->Data4[6], ActivePolicyGuid->Data4[7]);
    }
    if (ActivePolicyGuid != NULL)
    {
        LocalFree(ActivePolicyGuid);
    }

    system("pause");
    return 0;
}

在本人的笔记本中获取其所有电源策略执行如下：

平衡    Power Plan GUID: 381B4222-F694-41F0-9685-FF5BB260DF2E
Dell    Power Plan GUID: 49EF8FC0-BB7F-488E-B6A0-F1FC77EC649B
------------------
Active Plan GUID: 49EF8FC0-BB7F-488E-B6A0-F1FC77EC649B

在本人的另一台测试机中如下：

Balanced                Power Plan GUID: 381B4222-F694-41F0-9685-FF5BB260DF2E
High performance        Power Plan GUID: 8C5E7FDA-E8BF-4A96-9A85-A6E23A8C635C
Power saver             Power Plan GUID: A1841308-3541-4FAB-BC81-F71556F20B4A
------------------
Active Plan GUID: 8C5E7FDA-E8BF-4A96-9A85-A6E23A8C635C