How to receive battery information using the WinAPI

This sample show's how to retrieve the current battery information for your laptop without the need for the SysInfo.ocx control.

Screen Shot

The program utilises the following API call's and structure to obtain the information :


private Declare Function GetSystemPowerStatus Lib "kernel32" _
        (lpSystemPowerStatus as SYSTEM_POWER_STATUS) as Long
private Declare Function SetSystemPowerState Lib "kernel32" _
        (byval fSuspend as Long, byval fForce as Long) as Long

private Type SYSTEM_POWER_STATUS
    ACLineStatus as Byte 'Checks to see if you're connected to the
    'wall outlet or not
    BatteryFlag as Byte 'Battery status
    BatteryLifePercent as Byte 'precentage left
    Reserved1 as Byte 'Dont use
    BatteryLifeTime as Long 'Total time left of your battery
    BatteryFullLifeTime as Long 'Total UPtime of your battery
End Type





As you can see, it takes up much less space in your program and distributable than the 67k required by SysInfo.ocx

Download zipped project file (7k)


Comments

  • battery level programming

    Posted by Legacy on 11/19/2003 12:00am

    Originally posted by: jerome

    very useful, thanks...

    Reply
  • SetSystemPowerState

    Posted by Legacy on 01/13/2000 12:00am

    Originally posted by: Niraj Bhatt

    I can not see the use of this API in your sample..

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • With JRebel, developers get to see their code changes immediately, fine-tune their code with incremental changes, debug, explore and deploy their code with ease (both locally and remotely), and ultimately spend more time coding instead of waiting for the dreaded application redeploy to finish. Every time a developer tests a code change it takes minutes to build and deploy the application. JRebel keeps the app server running at all times, so testing is instantaneous and interactive.

  • Today's competitive marketplace requires the organization to frequently release and deploy applications at the pace of user demands, with reduced cost, risk, and increased quality. This book defines the basics of application release and deployment, and provides best practices for implementation with resources for a deeper dive. Inside you will find: The business and technical drivers behind automated application release and deployment. Evaluation guides for application release and deployment solutions. …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds