Re: Power Management - C / C++ / MFC Discussion Boards

Jack Puppy31-May-05 8:52

31-May-05 8:52

I recently had to do something like this in a project and settled on using SetUnhandledExceptionFilter

In CMyApp::InitInstance

<br />
SetUnhandledExceptionFilter(MyAppUnhandledExceptionFilter);<br />

The handler

<br />
LONG WINAPI MyAppUnhandledExceptionFilter(struct _EXCEPTION_POINTERS* ExceptionInfo);<br />
<br />
LONG WINAPI MyAppUnhandledExceptionFilter(struct _EXCEPTION_POINTERS* ExceptionInfo)<br />
{<br />
      LONG lReturnValue = EXCEPTION_EXECUTE_HANDLER;<br />
    <br />
      // We only want to handle this once<br />
      static BOOL bHandledException = FALSE;<br />
    <br />
      if (!bHandledException)<br />
      {<br />
            bHandledException = TRUE;<br />
        <br />
            // Do your stuff here...<br />
      }<br />
    <br />
      return (lReturnValue);<br />
}<br />

Pssst. You see that little light on your monitor? That's actually a government installed spy camera. Smile and wave to big brother!

Re: MFC and exception handling

Cedric Moonen31-May-05 20:03

Cedric Moonen

31-May-05 20:03

Hi !

Thanks for your response, it seems to be what I'm looking for Wink | ;)

Thanks!

Re: MFC and exception handling

Bob Stanneveld31-May-05 10:37

Bob Stanneveld

31-May-05 10:37

Hello,

All message handlers are protected by a TRY - CATCH_ALL block in the function: AfxCallWndProc See WinCore.cpp line 182 for more details.

However, it only catches MFC exceptions derived from CException..

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Power Management

Momotte31-May-05 4:28

Momotte

31-May-05 4:28

Hi folks,

I wanted to know if anyone has experience with power management unders XP. Mainly what I want to do is to be able to shutdown AND wake up the PC using the RTC alarm wake up feature of the BIOS.

If anyone can direct me to some piece of code or how to do it, I would appreciate.

Thanks for your time,

Re: Power Management

Toby Opferman31-May-05 14:36

Toby Opferman

31-May-05 14:36

The Plug & Play Manager is what notifies devices on the system of power management and shutting down or powering up in general.

You are talking simply about going into lower power mode right not hibernation?

What exactly do you want to shut down, the monitor? The hard disks? Everything? There is a configuration under Screen Savers that sets the interval to shut down these devices. I did notice at one point that a WM_SYSCOMMAND with f170, 1 was sent to an active window which caused the monitor to recieve a power IRP.

You may want to enable those features then debug how they occur if you want to force them.

8bc7c0ec02c0e404c0cc0680f7018827ebee

Re: Power Management

geo_m31-May-05 19:44

geo_m

31-May-05 19:44

Look around function SetSystemPowerState in MSDN. She belongs to the Power Management group, where other PM related stuff in WinXP is documented.

Shutdown can be easily achieved directly with this function, but about the Wake-up feature, I never tried that, so I don't know.

Re: Power Management

Momotte1-Jun-05 1:04

Momotte

1-Jun-05 1:04

I managed to figure out the shutdown using the Power Management functions. My real problem now is the wake-up feature. I know I can wakeup the system from poweroff using my BIOS RTC alarm. Also I know (by using the GetPwrCapabilities function) that my system support wakeup on RTC alarm from hibernation but my problem is that I do not know how to setup the wakeup call. Any informations on how to write data to my BIOS or to schedule an event using the power management functions would be appreciated.

Thanks for your time,

Re: Power Management

geo_m1-Jun-05 1:24

geo_m

1-Jun-05 1:24

I scanned the OnNow specifications and Windows and found this:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndevio/html/onnowapp.asp[^]

Where (at nearly bottom of the page) they write:

The OnNow-capable operating system can ensure that the PC system is in the working state at a scheduled time. To do this, applications can use timer objects to wake the PC from a low power state (assuming sufficient power is available). The operating system will track all timer objects and program the hardware with the next wake-up time when putting the system into the sleep state.

Create, Open, Set, and Cancel capabilities will be provided in "Waitable Timer" objects for use by event-handling applications or by Windows 2000 services. The following is an example:

BOOL SetWaitableTimer(HANDLE hTimer, const LARGE INTEGER *lpDueTime, LONG 
      lPeriod, PTIMERAPCROUTINE pfnCompletionRoutine, LPVOID 
      lpArgToCompletionRoutine, BOOL fResume)

Re: Power Management

Momotte1-Jun-05 6:07

Momotte

1-Jun-05 6:07

I don't seem to be able to do what I want with that function...

Re: Power Management

geo_m1-Jun-05 8:33

geo_m

1-Jun-05 8:33

Well, as I understood the documentation, you simply create a waitable timer to be waked at say 20 minutes, do the power down and windows should take care for the rest.

starting application....

Deian31-May-05 3:43

Deian

31-May-05 3:43

Hello,

I'm wondering if someone is familiar with the technique use by many programs today - starting the app before any other app, and pausing windows load (like adaware does).

Any help appreciated,
D>

Re: starting application....

toxcct31-May-05 3:50

toxcct

31-May-05 3:50

to load a program from another, use ShellExecute() (or more deprecated WinExec()).

to allow a program to be paused, you have to manage threads, with a flag raised by the GUI which is handled by the working thread...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: starting application....

Deian31-May-05 3:52

Deian

31-May-05 3:52

No,

I know how to launch program, the effect that I'm after is loading my application at windows startup, process tasks, and then allow or shut down the system Smile | :)

Thanks

Re: starting application....

David Crow1-Jun-05 2:34

David Crow

1-Jun-05 2:34

See MSDN article Q179365.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: starting application....

Deian1-Jun-05 20:16

Deian

1-Jun-05 20:16

Will do,

Thank you Smile | :)

Replace bits within UInt32

zuschauer198031-May-05 3:22

zuschauer1980

31-May-05 3:22

Hi!

How could i replace for example the first byte (call it b0) of a UInt32 variable?

thx

Re: Replace bits within UInt32

Ryan Binns31-May-05 3:28

Ryan Binns

31-May-05 3:28

zuschauer1980 wrote:
How could i replace for example the first byte (call it b0) of a UInt32 variable?

newVal = (oldVal & 0xffffff00) | (newByteVal & 0xff);

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Replace bits within UInt32

David Crow31-May-05 3:30

David Crow

31-May-05 3:30

By "first" do you mean least significant or most significant? Check out the bit-related operators such as AND (&), OR (|), NOT (~), and XOR (^).

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Replace bits within UInt32

PJ Arends31-May-05 9:06

PJ Arends

31-May-05 9:06

http://www.codeproject.com/cpp/bitbashing.asp[^]

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how to create a transparent pen?

pritamkd31-May-05 2:09

pritamkd

31-May-05 2:09

Hi,
I am developing a marker application. Basically allows free-hand drawing with the mouse. When i draw a line, i want the window below also to visible. I am not able to create a transparent Pen for this? i tried BS_HOLLOW, but it doesn't draw at all.

hdc = CreateDC(TEXT("DISPLAY"),NULL,NULL,NULL);
lb.lbColor = rgbCurrent;
lb.lbHatch = NULL;
lb.lbStyle = BS_SOLID;
//hNewPen = CreatePen(PS_SOLID,10,rgbCurrent);
//SetROP2(hdc,R2_MERGEPEN);
hNewPen = ExtCreatePen(PS_GEOMETRIC,10,&lb,0,NULL);
//SelectObject(hdc,CreateBrushIndirect(&lb));
//SetDCBrushColor(hdc,rgbCurrent);
SelectObject(hdc,hNewPen);
MoveToEx(hdc, PrevX, PrevY, NULL);
LineTo(hdc, CurrX, CurrY);
DeleteDC(hdc);
........

Can anyone help?

Hercules

Re: how to create a transparent pen?

Kaworu231-May-05 5:03

Kaworu2

31-May-05 5:03

Hi, I don't remember it very well, but you may search SelectStockObject (NULL_PEN); //NULL_BRUSH

C U later

Re: how to create a transparent pen?

pritamkd31-May-05 8:30

pritamkd

31-May-05 8:30

Thanks for replying...

But this code is all in Platform SDK, how do i create a NULL_PEN there. I create a BS_HOLLOW(same as BS_NULL) but it doesn't draw the line at all.

Your help will be appreciated!

Hercules

Line numbers

Stirfie31-May-05 1:54

Stirfie

31-May-05 1:54

Can anyone tell me how to show line numbers in the editor in visual studio 6. I've looked and cant find out how.

Regards
Paul

Re: Line numbers

Ravi Bhavnani31-May-05 2:08

Ravi Bhavnani

31-May-05 2:08

I didn't think you could do this before VS2003.

/ravi

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Re: Line numbers

Alexander ^M.,31-May-05 2:45

Alexander ^M.,

31-May-05 2:45

Isn't it displayed in the status bar?

Don't try it, just do it! Wink | ;-)

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.