如何编写一个Delphi程序来控制CPU风扇速度和监控温度？

我想使用Delphi创建一个程序，控制我的电脑风扇速度和监测温度

这样做涉及哪些API调用

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是否有好的代码示例可以共享？

您可以使用这些示例访问风扇转速（以及其他统计信息，如温度）。在Delphi中使用WMI的一个很好的示例可以从中获得。

您可以使用WMI类和， 从delphi中，必须使用组件->导入组件->导入类型库->下一步->选择库->下一步->将单元添加到项目->完成来导入Microsoft WMIScripting V1.x库

请参阅此代码。这只是一个简单的例子

program GetWMI_Info;

{$APPTYPE CONSOLE}

uses
  ActiveX,
  Variants,
  SysUtils,
  WbemScripting_TLB in '..\..\..\Documents\RAD Studio\5.0\Imports\WbemScripting_TLB.pas';

procedure ShowTemperatureInfo();
var
  WMIServices: ISWbemServices;
  Root       : ISWbemObjectSet;
  Item       : Variant;
  I          : Integer;
begin
 {
 http://msdn.microsoft.com/en-us/library/aa394493%28VS.85%29.aspx
 The Win32_TemperatureProbe  WMI class represents the properties of a temperature sensor (electronic thermometer).
 Most of the information that the Win32_TemperatureProbe WMI class provides comes from SMBIOS.
 Real-time readings for the CurrentReading property cannot be extracted from SMBIOS tables.
 For this reason, current implementations of WMI do not populate the CurrentReading property.
 The CurrentReading property's presence is reserved for future use.
 }

  Writeln('Temperature Info');
  Writeln('----------------');

  WMIServices := CoSWbemLocator.Create.ConnectServer('.', 'root\cimv2','', '', '', '', 0, nil);
  Root  := WMIServices.ExecQuery('Select * FROM Win32_TemperatureProbe','WQL', 0, nil);
  for I := 0 to Root.Count - 1 do
  begin
    Item := Root.ItemIndex(I);
      Writeln('Accuracy                        '+VarToStr(Item.Accuracy));
      Writeln('Availability                    '+VarToStr(Item.Availability));
      Writeln('Caption                         '+Item.Caption);
      Writeln('Config Manager Error Code       '+VarToStr(Item.ConfigManagerErrorCode));
      Writeln('Config Manager User Config      '+VarToStr(Item.ConfigManagerUserConfig));
      Writeln('Creation Class Name             '+VarToStr(Item.CreationClassName));
      Writeln('Current Reading                 '+VarToStr(Item.CurrentReading));
      Writeln('Description                     '+VarToStr(Item.Description));
      Writeln('Device ID                       '+VarToStr(Item.DeviceID));
      Writeln('Error Cleared                   '+VarToStr(Item.ErrorCleared ));
      Writeln('Error Description               '+VarToStr(Item.ErrorDescription));
      Writeln('Install Date                    '+VarToStr(Item.InstallDate));
      Writeln('Is Linear                       '+VarToStr(Item.IsLinear));
      Writeln('Last Error Code                 '+VarToStr(Item.LastErrorCode));
      Writeln('Lower Threshold Critical        '+VarToStr(Item.LowerThresholdCritical));
      Writeln('Lower Threshold Fatal           '+VarToStr(Item.LowerThresholdFatal));
      Writeln('Lower Threshold NonCritical     '+VarToStr(Item.LowerThresholdNonCritical));
      Writeln('Max Readable                    '+VarToStr(Item.MaxReadable));
      Writeln('Min Readable                    '+VarToStr(Item.MinReadable));
      Writeln('Name                            '+VarToStr(Item.Name));
      Writeln('Nominal Reading                 '+VarToStr(Item.NominalReading));
      Writeln('Normal Max                      '+VarToStr(Item.NormalMax));
      Writeln('Normal Min                      '+VarToStr(Item.NormalMin ));
      Writeln('PNP Device ID                   '+VarToStr(Item.PNPDeviceID));
      Writeln('Power Management Capabilities   '+VarToStr(Item.PowerManagementCapabilities));
      Writeln('Power Management Supported      '+VarToStr(Item.PowerManagementSupported));
      Writeln('Resolution                      '+VarToStr(Item.Resolution));
      Writeln('Status                          '+VarToStr(Item.Status));
      Writeln('Status Info                     '+VarToStr(Item.StatusInfo));
      Writeln('System Creation Class Name      '+VarToStr(Item.SystemCreationClassName));
      Writeln('System Name                     '+VarToStr(Item.SystemName));
      Writeln('Tolerance                       '+VarToStr(Item.Tolerance));
      Writeln('Upper Threshold Critical        '+VarToStr(Item.UpperThresholdCritical));
      Writeln('Upper Threshold Fatal           '+VarToStr(Item.UpperThresholdFatal));
      Writeln('Upper Threshold NonCritical     '+VarToStr(Item.UpperThresholdNonCritical));
      Writeln('');
  end;
end;

procedure  ShowCPUFanInfo();
var
  WMIServices: ISWbemServices;
  Root       : ISWbemObjectSet;
  Item       : Variant;
  I          : Integer;
begin
 {
  http://msdn.microsoft.com/en-us/library/aa394146%28VS.85%29.aspx
  The Win32_Fan WMI class represents the properties of a fan device in the computer system. For example, the CPU cooling fan.
 }
  Writeln('CPU FAN Info');
  Writeln('----------------');
  WMIServices := CoSWbemLocator.Create.ConnectServer('.', 'root\cimv2','', '', '', '', 0, nil);
  Root  := WMIServices.ExecQuery('Select * FROM Win32_Fan','WQL', 0, nil);
  for I := 0 to Root.Count - 1 do
  begin
    Item := Root.ItemIndex(I);

    Writeln('ActiveCooling                     '+VarToStr(Item.ActiveCooling));
    Writeln('Availability                      '+VarToStr(Item.Availability));
    Writeln('Caption                           '+VarToStr(Item.Caption));
    Writeln('Config Manager ErrorCode          '+VarToStr(Item.ConfigManagerErrorCode));
    Writeln('Config Manager UserConfig         '+VarToStr(Item.ConfigManagerUserConfig));
    Writeln('Creation ClassName                '+VarToStr(Item.CreationClassName));
    Writeln('Description                       '+VarToStr(Item.Description));
    Writeln('DesiredSpeed                      '+VarToStr(Item.DesiredSpeed));
    Writeln('DeviceID                          '+VarToStr(Item.DeviceID));
    Writeln('ErrorCleared                      '+VarToStr(Item.ErrorCleared));
    Writeln('ErrorDescription                  '+VarToStr(Item.ErrorDescription));
    Writeln('InstallDate                       '+VarToStr(Item.InstallDate));
    Writeln('LastErrorCode                     '+VarToStr(Item.LastErrorCode));
    Writeln('Name                              '+VarToStr(Item.Name));
    Writeln('PNPDeviceID                       '+VarToStr(Item.PNPDeviceID));
    Writeln('PowerManagement Capabilities      '+VarToStr(Item.PowerManagementCapabilities));
    Writeln('PowerManagement Supported         '+VarToStr(Item.PowerManagementSupported));
    Writeln('Status                            '+VarToStr(Item.Status));
    Writeln('StatusInfo                        '+VarToStr(Item.StatusInfo));
    Writeln('SystemCreation ClassName          '+VarToStr(Item.SystemCreationClassName));
    Writeln('SystemName                        '+VarToStr(Item.SystemName));
    Writeln('VariableSpeed                     '+VarToStr(Item.VariableSpeed));
    Writeln('');
  end;

End;


begin
  try
    CoInitialize(nil);
        ShowTemperatureInfo();
        ShowCPUFanInfo();
        Readln;
    CoUninitialize;
  except
    on E:Exception do
    Begin
        CoUninitialize;
        Writeln(E.Classname, ': ', E.Message);
        Readln;
    End;
  end;
end.

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你想用它做什么？知道现在主板对WMI的支持有多统一吗？我不知道答案——只是想知道。