How to check power supply plugged?

webtubbies · 14th September 2009, 12:47

Hello everybody,

I'm looking for a way to check if the power supply of a leptop is plugged when then user runs installer.

I'm not "fluent" in NSIS language, and at this time i've found nothing to help me.

MSG · 14th September 2009, 13:07

You need to use the system plugin to call the API command GetSystemPowerStatus() in Kernel32.dll. See:
http://nsis.sourceforge.net/Docs/Sys...html#callfuncs
And:
http://msdn.microsoft.com/en-us/libr...93(VS.85).aspx

webtubbies · 14th September 2009, 14:40

Thank You for links.
But i'm still lost... I don't understand the parameter I have to give to the Proc.
I'm so sorry.

MSG · 14th September 2009, 19:51

code:
  System::Alloc 12

  Pop $1

  System::Call "kernel32::GetSystemPowerStatus(i r1)"

  System::Call "*$1(&i1 .r2, &i1 .r3, &i1 .r4, &i1, i .r5, i .r6)"

  System::Free $1

  MessageBox MB_OK "ACLineStatus=$2, BatteryFlag=$3, BatteryLifePercent=$4, \

                    BatteryLifeTime=$5, BatteryFullLifeTime=$6"

See for details on the possible values: http://msdn.microsoft.com/en-us/libr...8VS.85%29.aspx

If you want to know how this works, take a close look at the system plugin readme I linked to. It allocates memory for a SYSTEM_POWER_STATUS structure, then calls the GetSystemPowerStatus function. It then disassembles the structure into four 1-byte integers and two DWORDS (which are 4 bytes each). (Props to Anders for teaching me how to use these things.)

webtubbies · 15th September 2009, 12:12

Hello MSG,

thank you for this snippet. I didn't understand that I have to allocate memory before the call.
Anyway, You right when you say I have to take a closer look to the msdn page.

(Sorry for my english I'm not fluent in this language too)

14th September 2009, 12:47	#1
webtubbies Junior Member Join Date: Sep 2009 Posts: 17	How to check power supply plugged? Hello everybody, I'm looking for a way to check if the power supply of a leptop is plugged when then user runs installer. I'm not "fluent" in NSIS language, and at this time i've found nothing to help me.

14th September 2009, 19:51	#4
MSG Major Dude Join Date: Oct 2006 Posts: 1,892	code: System::Alloc 12 Pop $1 System::Call "kernel32::GetSystemPowerStatus(i r1)" System::Call "*$1(&i1 .r2, &i1 .r3, &i1 .r4, &i1, i .r5, i .r6)" System::Free $1 MessageBox MB_OK "ACLineStatus=$2, BatteryFlag=$3, BatteryLifePercent=$4, \ BatteryLifeTime=$5, BatteryFullLifeTime=$6" See for details on the possible values: http://msdn.microsoft.com/en-us/libr...8VS.85%29.aspx If you want to know how this works, take a close look at the system plugin readme I linked to. It allocates memory for a SYSTEM_POWER_STATUS structure, then calls the GetSystemPowerStatus function. It then disassembles the structure into four 1-byte integers and two DWORDS (which are 4 bytes each). (Props to Anders for teaching me how to use these things.)

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14th September 2009, 13:07	#2
MSG Major Dude Join Date: Oct 2006 Posts: 1,892	You need to use the system plugin to call the API command GetSystemPowerStatus() in Kernel32.dll. See: http://nsis.sourceforge.net/Docs/Sys...html#callfuncs And: http://msdn.microsoft.com/en-us/libr...93(VS.85).aspx

14th September 2009, 14:40	#3
webtubbies Junior Member Join Date: Sep 2009 Posts: 17	Thank You for links. But i'm still lost... I don't understand the parameter I have to give to the Proc. I'm so sorry.

15th September 2009, 12:12	#5
webtubbies Junior Member Join Date: Sep 2009 Posts: 17	Hello MSG, thank you for this snippet. I didn't understand that I have to allocate memory before the call. Anyway, You right when you say I have to take a closer look to the msdn page. (Sorry for my english I'm not fluent in this language too)