C / C++ / MFC

receiving power management events in a service

18-Jan-05 4:27

There is NetServerEnum(), and the WNetOpenEnum()/WNetEnumResource() pair. Do either of these help?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

dilipjoseph17-Jan-05 16:50

dilipjoseph

17-Jan-05 16:50

Hi,

Please tell me how a windows service can recieve events (especially power management ones). There was a function RegisterSysMsgHandler() as part of OneNow initiative which was supposed to allow a service to listen for window events.. But I can't find the documentation for that function anywhere on the web. Is there a new function by some other name which achieves the same thing?

Thank you,

Dilip

Re: receiving power management events in a service

cmk17-Jan-05 19:29

cmk

17-Jan-05 19:29

In the structure SERVICE_STATUS.dwControlsAccepted set SERVICE_ACCEPT_POWEREVENT.

In the beginning of your service main routine use ::SetServiceStatus() to specify the controls accepted (i.e. handled) by your service (i.e. handler routine).

In your service handler routine add a case to handle SERVICE_CONTROL_POWEREVENT.

Will only work for Win2K and up (i think).

...cmk

Save the whales - collect the whole set

Static text...

dSolariuM17-Jan-05 16:04

dSolariuM

17-Jan-05 16:04

Hello,
I have a static text over an activex object but after debugging or
releasing the app the gray rectangle around the static text is still
there...
Please help me on this.
Thanks.

RegEnumValue example

jonavon blakly17-Jan-05 15:32

jonavon blakly

17-Jan-05 15:32

I need an example of RegEnumValue.

Re: RegEnumValue example

ThatsAlok17-Jan-05 18:04

ThatsAlok

17-Jan-05 18:04

First Take a look at RegEnumKey
RegEnumKey look Like this

LONG <code>RegEnumValue</code>(
  HKEY hKey,           <font color="green">  // handle to key to query </font>
  DWORD dwIndex,     <font color="green">    // index of value to query </font>
  LPTSTR lpValueName, <font color="green">   // value buffer </font>
  LPDWORD lpcValueName, <font color="green"> // size of value buffer </font>
  LPDWORD lpReserved,  <font color="green">  // reserved </font>
  LPDWORD lpType,      <font color="green">  // type buffer </font>
  LPBYTE lpData,      <font color="green">   // data buffer </font>
  LPDWORD lpcbData    <font color="green">   // size of data buffer </font>
);

Now Some Code Snippet

char szNameOfKey[200];<font color="green">//Buffer  </font>
DWORD dwBufferSize=200;<font color="green">//Buffer Size </font>
DWORD dwIndex=0;
CStringArray arrOfKeys;

Now Enumerate the HKEY_CURRENT_USER using RegEnumKey

 while(RegEnumKey(<code>HKEY_CURRENT_USER</code>, //
                  dwIndex++, <font color="green">//Index of Key to be Retrive </font>
                  szNameOfKey,<font color="green">//Buffer of Key </font>
                  dwBufferSize,<font color="green">//Buffer Size </font>
                  NULL,<font color="green">//as documented in MSDN </font>
                  NULL,<font color="green">//We don't need this right </font>
                  NULL,<font color="green">//So no need of it </font>
                  NULL)!= ERROR_NO_MORE_ITEMS)
 {
 <font color="green">//add New Found Key to array </font>
  arrOfKeys.Add(<code>szNameOfKey</code>);
 <font color="green">//Restucture the size of Buffer as it modified during  </font>
 <font color="green">//Enumeration </font>
  dwBufferSize=200;
 }

<font color="green">//Now <code>arrOfKeys</code> Hold all the Enumerated Key </font>

"I Think this Will Help"
<h5
alok gupta="" <br=""> visit me at http://www.thisisalok.tk

Re: RegEnumValue example

jonavon blakly18-Jan-05 15:06

jonavon blakly

18-Jan-05 15:06

Thank you very very much!

Create thumbnail of first page of PDF

Defenestration17-Jan-05 14:51

Defenestration

17-Jan-05 14:51

Does anyone know how to create a thumbnail image (BMP) of the first page of a PDF document ?

I'm planning on using it in a thumbnail viewer so it needs to be fast.

Hide & Show Menu bar dynamically

mclpun17-Jan-05 14:09

mclpun

17-Jan-05 14:09

Hi All,

I' m writing a Visual C++ MFC dialog-based program. I added a Menu bar uisng Insert->Resource-> Menu, not by writing code. Then, I tried to show and hide the Menu bar of a modal dialog dynamically.

By writing the following code, I succeed to hide the menu bar.

CWnd* pMain = AfxGetMainWnd();
if (pMain != NULL)
{
CMenu* pMenu = pMain->GetMenu();
while(pMenu != NULL && pMenu->GetMenuItemCount() > 0)
{
pMenu->DeleteMenu(0, MF_BYPOSITION);
pMain->DrawMenuBar();
}
}

But how can I show the menu again? Please kindly help me!

Cheers,
hmc

Re: Hide & Show Menu bar dynamically

Serge Krynine17-Jan-05 17:52

Serge Krynine

17-Jan-05 17:52

I think this code illustrates what you need:

void CShowHideMenuDlg::OnShowMenu()
{
// Load and add the new menu
CMenu mMainMenu;
mMainMenu.LoadMenu(IDR_MENU1);
ASSERT(mMainMenu);
SetMenu(&mMainMenu);
}

void CShowHideMenuDlg::OnHideMenu()
{
// Remove and destroy the old menu
SetMenu(NULL);
::DestroyMenu(GetMenu()->GetSafeHmenu());
}

Regards,
Serge Krynine

Re: Hide & Show Menu bar dynamically

mclpun17-Jan-05 19:20

mclpun

17-Jan-05 19:20

Thanks Serge, got it! Smile | :)

Single click on tray icon to minimize and restore main window

Defenestration17-Jan-05 14:08

Defenestration

17-Jan-05 14:08

Also, if the main window is already restored but is obscured by another window, then the window should be moved to the front instead of being minimized.

How to do it ?

Accessing IE IWebbrowser2 object with toolbar

tnguyen44417-Jan-05 12:54

tnguyen444

17-Jan-05 12:54

Hi,
I have a toolbar and I am trying to access the IWebBrowser2 in WM_LBUTTONDOWN, when someone clicks on a control on my toolbar with the following code:

BSTR bstrUrl;

CComPtr<iwebbrowser2> browser;
browser->get_LocationURL(&bstrUrl);

I am getting a debug assertion failed!
p!=0

I know there should be more to the code. Can somebody help?

CListCtrl question

Tom Wright17-Jan-05 11:29

Tom Wright

17-Jan-05 11:29

I'm wanting to store a thread id in one of the colums of my list control. someone suggested that I store it in the LPARAM. Has anyone done this and if so can you give a suggestion as to how to go about this? Also how to retreive the thread id from that colum?

Thanks

Tom Wright
tawright915@yahoo.com

Re: CListCtrl question

David Crow17-Jan-05 13:36

17-Jan-05 13:36

How about using CListCtrl::SetItemData()?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: CListCtrl question

Serge Krynine17-Jan-05 18:38

Serge Krynine

17-Jan-05 18:38

Hope this will help:

void SetThreadId(CListCtrl& rListCtrl, unsigned int const nColumn, unsigned int const nThreadId)
{
CHeaderCtrl* pHeaderCtrl = rListCtrl.GetHeaderCtrl();
ASSERT(NULL != pHeaderCtrl);
HDITEM hdi;
::memset(&hdi, 0, sizeof(HDITEM));
hdi.mask = HDI_LPARAM;
hdi.lParam = nThreadId;
pHeaderCtrl->SetItem(nColumn, &hdi);
}

unsigned int GetThreadId(CListCtrl& rListCtrl, unsigned int const nColumn)
{
HDITEM hdi;
::memset(&hdi, 0, sizeof(HDITEM));
hdi.mask = HDI_LPARAM;
CHeaderCtrl* pHeaderCtrl = rListCtrl.GetHeaderCtrl();
ASSERT(NULL != pHeaderCtrl);
pHeaderCtrl->GetItem(nColumn, &hdi);
return hdi.lParam;
}

Regards,
Serge Krynine

Re: CListCtrl question

Tom Wright18-Jan-05 7:04

Tom Wright

18-Jan-05 7:04

That did it. Thanks.

Tom Wright
tawright915@yahoo.com

Hard disk serial

Fabio Miguez17-Jan-05 9:38

17-Jan-05 9:38

Hey all,

Trying to retrieve the hd serial through VC++ 6.0, not finding a way to do it.

MSDN only had WMI scripting for this, and that's over my head. Is that the only way?

Best Regards

Fabio Miguez

David Crow17-Jan-05 10:27

17-Jan-05 10:27

Does this help?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Fabio Miguez17-Jan-05 11:02

17-Jan-05 11:02

Hey David,

Thanks a lot for the link. I am running through the code right now, and a lot of it is foreign to me, but I will see how I can implement this onto my code. I am also having problems compiling, but the .exe available at the site works.

I would like to take advantage of the moment to ask if it has to be this complex, getting a serial number for the HD. Is there no function or simpler code able to do it?

Thanks again!

Best Regards

Fabio Miguez

Blake Miller17-Jan-05 11:11

Blake Miller

17-Jan-05 11:11

GetVolumeInformation - See the lpVolumeSerialNumber field in the data structure.
Maybe that is the information you wanted.

Fabio Miguez17-Jan-05 12:17

17-Jan-05 12:17

Hey Blake,

Great, it seems I am getting somewhere now. I have implemented it in my test dialog, and lpVolumeNameBuffer and lpFileSystemNameBuffer are correct (the drive name and NTFS were returned properly). The serial number looks good, a 7 digit integer, but when I compare to the serial given by diskid32.exe, the program suggested above, they do not match. The serial on diskid32.exe has a mix of alphanumeric characters. The one I am obtaining using GetVolumeInformation can only be an integer, since the parameter used to store it is a DWORD, and I am formatting it as such:

m_sResults.Format("%d", &SerialNumber);

Any ideas where I could check the actual disk serial, short of looking on the HD casing? I use a laptop, so that would be a little harder than on a desktop.

Thanks again, great help!

Best Regards

Fabio Miguez

David Crow17-Jan-05 13:31

17-Jan-05 13:31

Fabio Miguez wrote:
m_sResults.Format("%d", &SerialNumber);

Do you mean to take the address of, rather than the value of, SerialNumber?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Fabio Miguez17-Jan-05 16:08