Battery status for PocketPC

Battery status for PocketPC

• John007

  Hi Bruce,

  Thanks for the suggestion but i tried that as well and it is giving me 1 error

  Here's my code for that

  using System;

  using System.Collections.Generic;

  using System.ComponentModel;

  using System.Data;

  using System.Drawing;

  using System.Text;

  using System.Windows.Forms;

  using System.Runtime.InteropServices;

  // Type to hold data returned from the unmanaged

  // GetSystemPowerStatusEx function

  internal class SYSTEM_POWER_STATUS_EX

  {

  public byte ACLineStatus;

  public byte BatteryFlag;

  public byte BatteryLifePercent;

  public byte Reserved1;

  public uint BatteryLifeTime;

  public uint BatteryFullLifeTime;

  public byte Reserved2;

  public byte BackupBatteryFlag;

  public byte BackupBatteryLifePercent;

  public byte Reserved3;

  public uint BackupBatteryLifeTime;

  public uint BackupBatteryFullLifeTime;

  }

  [DllImport("coredll.dll", EntryPoint = "GetSystemPowerStatusEx", SetLastError = true)]

  static extern bool GetSystemPowerStatusEx(out SYSTEM_POWER_STATUS_EX lpSystemPowerStatus, bool fUpdate); /***** this line flashes an error at bool(even tried replacing that with uint - it says Expected class, delegate, enum, interface...) PLEASE HELP ******/

  namespace battapp

  {

  public partial class Form1 : Form

  {

  public Form1()

  {

  InitializeComponent();

  }

  private void button1_Click(object sender, EventArgs e)

  {

  SYSTEM_POWER_STATUS_EX status = new SYSTEM_POWER_STATUS_EX();

  if(GetSystemPowerStatusEx(status, true))

  percent.Text=status.BackupBatteryLifePercent;

  else

  percent.Text="error";

  }

  }

  }

  
  
  

• LGuy

  Use the OpenNETCF.Windows.Forms.BatteryLife class in the SDF: http://opennetcf.org/sdf2

  Cheers

  Daniel

  
  
  

• Whisk

  Try placing the p/invoke declaration inside the definition for Form1.

  public partial class Form1 : Form

  {

  // ...

  [DllImport("coredll", EntryPoint = "GetSystemPowerStatusEx", SetLastError = true)]

  private static extern bool GetSystemPowerStatusEx(SYSTEM_POWER_STATUS_EX lpSystemPowerStatus, bool fUpdate);

  // ...

  }

  
  
  

• Ven

  Try something like:
  
  struct SYSTEM_POWER_STATUS_EX
  {
  byte ACLineStatus;
  byte BatteryFlag;
  byte BatteryLifePercent;
  byte Reserved1;
  uint BatteryLifeTime;
  uint BatteryFullLifeTime;
  byte Reserved2;
  byte BackupBatteryFlag;
  byte BackupBatteryLifePercent;
  byte Reserved3;
  uint BackupBatteryLifeTime;
  uint BackupBatteryFullLifeTime;
  }
  
  
  [DllImport("coredll")]
  static extern bool
  GetSystemPowerStatusEx(out SYSTEM_POWER_STATUS_EX pstatus, bool fUpdate);
  
  SYSTEM_POWER_STATUS_EX pwr_status = new SYSTEM_POWER_STATUS_EX();
  bool success = GetSystemPowerStatusEx(out pwr_status, false);
  
  ...
  
  
• Battery status for PocketPC