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某次windows10 大更新，坑啊，调节亮度的快捷键失效了，多次卸载集显驱动和重新安装没有解决，无奈使用电源管理里面的亮度滑竿几个月后，更新了win10 1803， 本想能解决这个问题，然而。。。无奈只能自力更生，通过其他办法解决问题
一开始看到的是 Monitor Monitor Configuration Functions ，
https://blog.csdn/tody_guo/article/details/16898749
https://msdn.microsoft/en-us/library/ms775232(v=vs.85).aspx
估计微软停止维护这套api很久了，获取的 physical monitor handle 总是为0，此法不行
然后找到一个瞎眼的调gammer。。。。
最后找到这个 https://blog.csdn/tody_guo/article/details/30255233
获得最终解决办法
本文工具 核心代码以及思路 均来自
https://blog.csdn/tody_guo/article/details/30255233
核心原理是 使用 c++连接 wmi 服务，进而修改 笔记本屏幕 lcd 背光亮度
wmi 接口路径
调节亮度类接口
root\wmi\WmiMonitorBrightnessMethods
获取当前亮度类接口
root\wmi\WmiMonitorBrightness
使用和细节：
因为无法使用fn当作热键，所以我使用 shift + alt 来代替
此程序目前硬编码为
shift + alt + f8 降低 5% 亮度
shift + alt + f9 提升 5% 亮度
可以在 第252行 和 第253行 修改硬编码的热键
在第184行修改硬编码 一阶亮度值
结束程序请使用 任务管理器直接结束
程序使用单例模式
程序没有窗口，请在任务管理器里面检查程序是否启动成功
vs2017工程
微云：https://share.weiyun/5cluRgV
完整源代码如下
#include <iostream>
#include <string>
#include <windows.h>
#include <objbase.h>
#include <wbemidl.h>
#include <comdef.h>
#include <mutex>
#pragma comment(lib, "wbemuuid.lib")
#pragma comment(lib, "comsuppw.lib")
using namespace std;
// wmi namespace
IWbemLocator *wmiLocator = NULL;
IWbemServices *wmiNamespace = 0;
BSTR wmiPath = SysAllocString(L"root\\wmi");
HRESULT hr = S_OK;
// brightnessAdjustmentClass
IWbemClassObject *brightnessAdjustmentClass = NULL;
IWbemClassObject *brightnessAdjustmentClassInstant = NULL;
IWbemClassObject *brightnessAdjustmentClassObject = NULL;
IWbemClassObject *brightnessAdjustmentMethodInstant = NULL;
IEnumWbemClassObject *brightnessAdjustmentClassEnum = NULL;
BSTR brightnessAdjustmentClassPath = SysAllocString(L"WmiMonitorBrightnessMethods");
BSTR brightnessAdjustmentMethodName = SysAllocString(L"WmiSetBrightness");
BSTR brightnessAdjustmentMethodArgName1 = SysAllocString(L"Timeout");
BSTR brightnessAdjustmentMethodArgName2 = SysAllocString(L"Brightness");
BSTR brightnessAdjustmentClassQuery = SysAllocString(L"Select * from WmiMonitorBrightnessMethods");
// brightnessClass
IEnumWbemClassObject *brightnessClassEnum = NULL;
//IWbemClassObject *brightnessClass = NULL;
IWbemClassObject *brightnessClassObject = NULL;
BSTR brightnessClassPath = SysAllocString(L"WmiMonitorBrightness");
BSTR brightnessVariableName = SysAllocString(L"CurrentBrightness");
BSTR brightnessQuery = SysAllocString(L"Select * from WmiMonitorBrightness");
int Init()
{
// Initialize COM and connect up to CIMOM
hr = CoInitialize(0);
if (FAILED(hr))
return -1;
hr = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_DEFAULT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);
if (FAILED(hr))
return -1;
hr = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID *)&wmiLocator);
if (FAILED(hr))
return -1;
hr = wmiLocator->ConnectServer(wmiPath, NULL, NULL, NULL, 0, NULL, NULL, &wmiNamespace);
if (hr != WBEM_S_NO_ERROR)
return -1;
hr = CoSetProxyBlanket(wmiNamespace, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE);
if (hr != WBEM_S_NO_ERROR)
return -1;
// query variable enum
hr = wmiNamespace->ExecQuery(_bstr_t(L"WQL"), brightnessAdjustmentClassQuery, WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &brightnessAdjustmentClassEnum);
if (hr != WBEM_S_NO_ERROR)
return -1;
/*hr = wmiNamespace->ExecQuery(_bstr_t(L"WQL"), brightnessQuery, WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &brightnessClassEnum);
if (hr != WBEM_S_NO_ERROR)
return -1;*/
// get class obj
ULONG ret;
hr = brightnessAdjustmentClassEnum->Next(WBEM_INFINITE, 1, &brightnessAdjustmentClassObject, &ret);
if (hr != WBEM_S_NO_ERROR)
return -1;
hr = wmiNamespace->GetObject(brightnessAdjustmentClassPath, 0, NULL, &brightnessAdjustmentClass, NULL);
if (hr != WBEM_S_NO_ERROR)
return -1;
// get brightness adjust method instant
hr = brightnessAdjustmentClass->GetMethod(brightnessAdjustmentMethodName, 0, &brightnessAdjustmentClassInstant, NULL);
if (hr != WBEM_S_NO_ERROR)
return -1;
hr = brightnessAdjustmentClassInstant->SpawnInstance(0, &brightnessAdjustmentMethodInstant);
if (hr != WBEM_S_NO_ERROR)
return -1;
return 0;
}
int GetBrightness()
{
// 每次都需要查询
if (brightnessClassEnum) brightnessClassEnum->Release();
if (brightnessClassObject) brightnessClassObject->Release();
HRESULT hr = wmiNamespace->ExecQuery(_bstr_t(L"WQL"), brightnessQuery, WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &brightnessClassEnum);
if (hr != WBEM_S_NO_ERROR)
return -1;
DWORD ret;
hr = brightnessClassEnum->Next(WBEM_INFINITE, 1, &brightnessClassObject, &ret);
if (hr != WBEM_S_NO_ERROR)
return -1;
// 获得亮度值
VARIANT brightnessValue;
VariantInit(&brightnessValue);
hr = brightnessClassObject->Get(brightnessVariableName, 0, &brightnessValue, 0, 0);
if (hr != WBEM_S_NO_ERROR)
return -1;
return brightnessValue.uintVal;
}
int SetBrightness(int brightness)
{
// 亮度范围是 [0, 100]
brightness = min(max(brightness, 0), 100);
// write brightness adjust params
VARIANT var;
VariantInit(&var);
V_VT(&var) = VT_BSTR;
// write timeout param
V_BSTR(&var) = SysAllocString(L"0");
hr = brightnessAdjustmentMethodInstant->Put(brightnessAdjustmentMethodArgName1, 0, &var, CIM_UINT32);
if (hr != WBEM_S_NO_ERROR)
return -1;
// write brightness param
V_BSTR(&var) = SysAllocString(to_wstring(brightness).c_str());
hr = brightnessAdjustmentMethodInstant->Put(brightnessAdjustmentMethodArgName2, 0, &var, CIM_UINT8);
VariantClear(&var);
if (hr != WBEM_S_NO_ERROR)
return -1;
// 获取 method instant path 和 execute
VARIANT pathVariable;
VariantInit(&pathVariable);
hr = brightnessAdjustmentClassObject->Get(_bstr_t(L"__PATH"), 0, &pathVariable, NULL, NULL);
if (hr != WBEM_S_NO_ERROR)
return -1;
hr =wmiNamespace->ExecMethod(pathVariable.bstrVal, brightnessAdjustmentMethodName, 0, NULL, brightnessAdjustmentMethodInstant, NULL, NULL);
VariantClear(&pathVariable);
if (hr != WBEM_S_NO_ERROR)
return -1;
return 0;
}
void Cleanup()
{
// 清理
SysFreeString(wmiPath);
SysFreeString(brightnessAdjustmentClassPath);
SysFreeString(brightnessAdjustmentMethodName);
SysFreeString(brightnessAdjustmentMethodArgName1);
SysFreeString(brightnessAdjustmentMethodArgName2);
SysFreeString(brightnessAdjustmentClassQuery);
SysFreeString(brightnessClassPath);
SysFreeString(brightnessVariableName);
SysFreeString(brightnessQuery);
brightnessAdjustmentClass->Release();
brightnessAdjustmentMethodInstant->Release();
brightnessAdjustmentClassInstant->Release();
brightnessAdjustmentClassObject->Release();
brightnessAdjustmentClassEnum->Release();
//if (brightnessClass) brightnessClass->Release();
brightnessClassObject->Release();
brightnessClassEnum->Release();
wmiNamespace->Release();
wmiLocator->Release();
CoUninitialize();
}
// 亮度进阶值
const int incrementValue = 5;
void IncreaseBrightness()
{
// 提升一阶亮度
int i = GetBrightness();
SetBrightness(i + incrementValue);
}
void ReduceBrightness()
{
// 降低一阶亮度
int i = GetBrightness();
SetBrightness(i - incrementValue);
}
ATOM hotKeyId1, hotKeyId2;
LRESULT __stdcall WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
switch (Msg)
{
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_HOTKEY:
if (wParam == hotKeyId1)
PostMessageA(0, WM_USER + 1, 0, 0);
else if (wParam == hotKeyId2)
PostMessageA(0, WM_USER + 2, 0, 0);
break;
}
return DefWindowProcA(hWnd, Msg, wParam, lParam);
}
int __stdcall WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
// 全局唯一
auto m = CreateMutexA(NULL, TRUE, "{CAF16FA1-1E0C-419B-9D45-99B5719ED318}");
if (ERROR_ALREADY_EXISTS == GetLastError())
return -1;
int r = Init();
if (r != 0)
return -1;
//创建隐藏窗口，仅用于捕获热键
WNDCLASSEX wcex;
memset(&wcex, 0, sizeof(wcex));
wcex.cbSize = sizeof(wcex);
wcex.style = 0;
wcex.lpfnWndProc= WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = GetModuleHandleA(0);
wcex.hIcon = 0;
wcex.hCursor = 0;
wcex.hbrBackground = 0;
wcex.lpszMenuName = 0;
wcex.lpszClassName = "test";
if (RegisterClassExA(&wcex) == FALSE)
return -1;
HWND hwnd = CreateWindowA("test", "", WS_EX_NOACTIVATE, 0, 0, 0, 0, 0, 0, GetModuleHandleA(0), 0);
ShowWindow(hwnd, SW_HIDE);
//注册热键
hotKeyId1 = GlobalAddAtom("MonitorBrightnessAdjuster1") - 0xc000;
hotKeyId2 = GlobalAddAtom("MonitorBrightnessAdjuster2") - 0xc000;
int b = RegisterHotKey(hwnd, hotKeyId1, MOD_SHIFT | MOD_ALT, VK_F8);
b = RegisterHotKey(hwnd, hotKeyId2, MOD_SHIFT | MOD_ALT, VK_F9);
MSG msg;
while (GetMessageA(&msg, 0, 0, 0))
{
TranslateMessage(&msg);
DispatchMessageW(&msg);
if (msg.message == WM_USER + 1)
ReduceBrightness();
else if (msg.message == WM_USER + 2)
IncreaseBrightness();
}
// 一般不会到达这里，一般是直接任务管理器结束此程序
// 清理
UnregisterHotKey(hwnd, hotKeyId1);
UnregisterHotKey(hwnd, hotKeyId2);
GlobalDeleteAtom(hotKeyId1);
GlobalDeleteAtom(hotKeyId2);
Cleanup();
return 0;
}版权声明：本文标题：笔记本屏幕 亮度 背光调节 工具 c++ 用来解决亮度调节功能键失效问题 内容由热心网友自发贡献，该文观点仅代表作者本人， 转载请联系作者并注明出处：https://www.elefans.com/dianzi/1728774451a1172329.html， 本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。
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