win7屏幕亮度如何调整
更新时间：2023-10-20Win7屏幕亮度调整的API介绍
在Win7中，可以使用WMI API来控制屏幕亮度。WMI（Windows Management Instrumentation）是一种Windows系统管理技术，它通过公开的API提供了对系统管理信息的访问能力。以下是Win7屏幕亮度调整需要用到的WMI API：
ManagementScope scope = new ManagementScope("root\\WMI");
SelectQuery query = new SelectQuery("WmiMonitorBrightness");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);
ManagementObjectCollection objectCollection = searcher.Get();
foreach (ManagementObject mObj in objectCollection)
{
//获取屏幕亮度（0~100）
int currentBrightness = (byte)mObj.GetPropertyValue("CurrentBrightness");
//获取支持的最大亮度值
int maxBrightness = (byte)mObj.GetPropertyValue("MaxBrightness");
//获取支持的最小亮度值
int minBrightness = (byte)mObj.GetPropertyValue("MinBrightness");
}
Win7屏幕亮度调整的C#示例
以下是使用C#代码来设置Win7屏幕亮度的示例：
private void SetBrightness(int brightness)
{
ManagementScope scope = new ManagementScope("root\\WMI");
SelectQuery query = new SelectQuery("WmiMonitorBrightnessMethods");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);
ManagementObjectCollection objectCollection = searcher.Get();
foreach (ManagementObject mObj in objectCollection)
{
//调用API设置屏幕亮度
mObj.InvokeMethod("WmiSetBrightness", new Object[] { UInt32.MaxValue, brightness });
}
}
Win7屏幕亮度调整的C++示例
以下是使用C++代码来设置Win7屏幕亮度的示例：
#include#include #include #include int main() { IWbemServices* pSvc = NULL; IWbemLocator* pLoc = NULL; HRESULT hres = CoInitializeEx(0, COINIT_MULTITHREADED); if (FAILED(hres)) { return 0; } hres = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_DEFAULT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL); if (FAILED(hres)) { CoUninitialize(); return 0; } hres = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_ALL, IID_IWbemLocator, (LPVOID*)&pLoc); if (FAILED(hres)) { CoUninitialize(); return 0; } hres = pLoc->ConnectServer(_bstr_t(L"ROOT\\WMI"), NULL, NULL, 0, NULL, 0, 0, &pSvc); if (FAILED(hres)) { pLoc->Release(); CoUninitialize(); return 0; } hres = CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE); if (FAILED(hres)) { pSvc->Release(); pLoc->Release(); CoUninitialize(); return 0; } BSTR strClassPath = SysAllocString(L"WmiMonitorBrightnessMethods"); BSTR strMethodName = SysAllocString(L"WmiSetBrightness"); IWbemClassObject* pClass = NULL; hres = pSvc->GetObject(strClassPath, 0, NULL, &pClass, NULL); if (FAILED(hres)) { SysFreeString(strClassPath); SysFreeString(strMethodName); pSvc->Release(); pLoc->Release(); CoUninitialize(); return 0; } IWbemClassObject* pInParamsDefinition = NULL; IWbemClassObject* pClassInstance = NULL; hres = pClass->GetMethod(strMethodName, 0, &pInParamsDefinition, NULL); if (FAILED(hres)) { SysFreeString(strClassPath); SysFreeString(strMethodName); pSvc->Release(); pLoc->Release(); CoUninitialize(); return 0; } pClassInstance = pClass->SpawnInstance(0); VARIANT var; var.vt = VT_BSTR; var.bstrVal = SysAllocString(L"\\\\.\\ROOT\\WMI"); hres = pClassInstance->Put(L"InstanceName", 0, &var, 0); if (FAILED(hres)) { SysFreeString(strClassPath); SysFreeString(strMethodName); pSvc->Release(); pLoc->Release(); CoUninitialize(); return 0; } VariantClear(&var); var.vt = VT_I4; var.lVal = 0x18; hres = pClassInstance->Put(L"Brightness", 0, &var, 0); if (FAILED(hres)) { SysFreeString(strClassPath); SysFreeString(strMethodName); pSvc->Release(); pLoc->Release(); CoUninitialize(); return 0; } VariantClear(&var); ULONG uReturn = 0; hres = pSvc->ExecMethod(strClassPath, strMethodName, 0, NULL, pClassInstance, NULL, NULL); if (FAILED(hres)) { SysFreeString(strClassPath); SysFreeString(strMethodName); pSvc->Release(); pLoc->Release(); CoUninitialize(); return 0; } pClass->Release(); pClassInstance->Release(); pSvc->Release(); pLoc->Release(); SysFreeString(strClassPath); SysFreeString(strMethodName); CoUninitialize(); return 0; }
总结
Win7屏幕亮度可以使用WMI API进行控制，C#和C++都是可以用来实现的编程语言，需要注意的是，使用WMI API调整屏幕亮度需要管理员权限。
返回内容：（使用HTML格式）Win7屏幕亮度如何调整
以下是关于Win7屏幕亮度调整的讲解：
-
Win7屏幕亮度调整的API介绍
在Win7中，可以使用WMI API来控制屏幕亮度。WMI（Windows Management Instrumentation）是一种Windows系统管理技术，它通过公开的API提供了对系统管理信息的访问能力。
以下是Win7屏幕亮度调整需要用到的WMI API：
ManagementScope scope = new ManagementScope("root\\WMI"); SelectQuery query = new SelectQuery("WmiMonitorBrightness"); ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query); ManagementObjectCollection objectCollection = searcher.Get(); foreach (ManagementObject mObj in objectCollection) { //获取屏幕亮度（0~100） int currentBrightness = (byte)mObj.GetPropertyValue("CurrentBrightness"); //获取支持的最大亮度值 int maxBrightness = (byte)mObj.GetPropertyValue("MaxBrightness"); //获取支持的最小亮度值 int minBrightness = (byte)mObj.GetPropertyValue("MinBrightness"); } -
Win7屏幕亮度调整的C#示例
以下是使用C#代码来设置Win7屏幕亮度的示例：
private void SetBrightness(int brightness) { ManagementScope scope = new ManagementScope("root\\WMI"); SelectQuery query = new SelectQuery("WmiMonitorBrightnessMethods"); ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query); ManagementObjectCollection objectCollection = searcher.Get(); foreach (ManagementObject mObj in objectCollection) { //调用API设置屏幕亮度 mObj.InvokeMethod("WmiSetBrightness", new Object[] { UInt32.MaxValue, brightness }); } } -
Win7屏幕亮度调整的C++示例
以下是使用C++代码来设置Win7屏幕亮度的示例：
#include <stdio.h> #include <windows.h> #include <wmiutils.h> #include <wbemcli.h> int main() { //待补充 return 0; } -
总结
Win7屏幕亮度可以使用WMI API进行控制，C#和C++都是可以用来实现的编程语言，需要注意的是，使用WMI API调整屏幕亮度需要管理员权限。
