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Visual C++

PowerMonitor.cpp：源码内容

							// This is the main project file for VC++ application project 
// generated using an Application Wizard.
#include "stdafx.h"
#using <mscorlib.dll>
using namespace System;
using namespace System::Runtime::InteropServices;
[StructLayoutAttribute(LayoutKind::Sequential)]
__gc class PStat {
public:
    System::Byte ACLineStatus;           
    System::Byte BatteryFlag;           
    System::Byte BatteryLifePercent;    
    System::Byte Reserved1;             
    System::UInt32 BatteryLifeTime;      
    System::UInt32 BatteryFullLifeTime;  
};
// Define the BOOL type
typedef int BOOL;
// Prototype for the function
[DllImportAttribute("Kernel32.dll", CharSet=CharSet::Auto)]
BOOL GetSystemPowerStatus(PStat* ps);
// This is the entry point for this application
#ifdef _UNICODE
int wmain(void)
#else
int main(void)
#endif
{
    Console::WriteLine(S"Power Status Test...");
    PStat* ps = new PStat();
    BOOL b = GetSystemPowerStatus(ps);
    Console::WriteLine(S"Got status, return was {0}", __box(b));
    // Report on the AC line status
    Console::Write(S"AC line power status is ");
    switch(ps->ACLineStatus) {
    case 0:
        Console::WriteLine("'off'");
        break;
    case 1:
        Console::WriteLine("'on'");
        break;
    case 255:
        Console::WriteLine("'unknown'");
        break;
    }
    // Report on the battery status
    Console::Write(S"Battery charge status is ({0})", 
                                            __box(ps->BatteryFlag));
    if (ps->BatteryFlag & 1)
        Console::Write(" 'high'");
    if (ps->BatteryFlag & 2)
        Console::Write(" 'low'");
    if (ps->BatteryFlag & 4)
        Console::Write(" 'critical'");
    if (ps->BatteryFlag & 8)
        Console::Write(" 'charging'");
    if (ps->BatteryFlag & 128)
        Console::Write(" 'no system battery'");
    Console::WriteLine();
    // What's the percentage charge left in the battery?
    Console::WriteLine(S"Battery life is {0}%", 
                                        __box(ps->BatteryLifePercent));
    // How many seconds battery life is left?
    if (ps->BatteryLifeTime == -1)
        Console::WriteLine("Battery life in seconds: Unknown");
    else
        Console::WriteLine(S"Battery seconds remaining: {0} secs", 
                                        __box(ps->BatteryLifeTime));
    return 0;
}

						