C / C++ / MFC

19-Nov-02 0:08

Hi,

I've done a prog to shut down a computer after a period of time via InitiateSystemShutdown(). I got a problem in W2K -> windows shuts down and displays a messagebox: i it now safe to shut down the computer (or something like that). Is there any possibility to make w2k power down the system ? I got this problem only in w2k, w9x and xp works fine, nt4 not tested.

tia
-widi

Re: shutdown

RobJones19-Nov-02 5:35

RobJones

19-Nov-02 5:35

I have been using this.. put this in one of you .h files..

BOOL MySystemShutdown()
	{
	   HANDLE hToken; 
	   TOKEN_PRIVILEGES tkp; 
 
	   // Get a token for this process. 
 	   if (!OpenProcessToken(GetCurrentProcess(), 
			TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) 
		  return( FALSE ); 
 
	   // Get the LUID for the shutdown privilege. 
 	   LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,	&tkp.Privileges[0].Luid); 
 
	   tkp.PrivilegeCount = 1;  // one privilege to set    
	   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; 
 
	   // Get the shutdown privilege for this process. 
	   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, (PTOKEN_PRIVILEGES)NULL, 0); 
 
	   if (GetLastError() != ERROR_SUCCESS) 
		  return FALSE; 
 
	   // Shut down the system and force all applications to close. 
	   if (!ExitWindowsEx(EWX_POWEROFF | EWX_FORCE, 0)) 
		  return FALSE; 

	   return TRUE;
	}

Then make a call to the function in you app..

MySystemShutdown();

I've tested it in windows NT and 2k.. havent tried it in 9x..

Re: shutdown

Anonymous20-Nov-02 23:36

Detect number of lines for an edit control?

20-Nov-02 23:36

thanks,
that's what I've been looking for.

-widi

Anonymous18-Nov-02 23:47

18-Nov-02 23:47

Hi, I have an CEdit control which can be resized. The user can switch from a single line edit control to a multi line control if he decides so.

How do I detect the number of lines? I need to catch the switch from a single- to multi line and change some atributes.

Thanks

Rickard Andersson²⁰19-Nov-02 0:34

19-Nov-02 0:34

Anonymous wrote:
How do I detect the number of lines?

GetLineCount() is a member of CEdit

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Anonymous19-Nov-02 0:46

19-Nov-02 0:46

ohh

tack rickard

Anonymous19-Nov-02 0:49

19-Nov-02 0:49

ah no, GetLineCount() retreives the lines currently in the control, not the number of lines a edit control can hold.

you know, i need to detect if an edit control after WM_SIZE is big enough to hold multiple lines.

Rickard Andersson²⁰19-Nov-02 0:55

19-Nov-02 0:55

Anonymous wrote:
not the number of lines a edit control can hold

Hm... Is that even possible? Unsure | :~

Anonymous wrote:
not the number of lines a edit control can hold

Try set a varible to the maximum count of lines and then every key press in the edit control you check if there is too many lines and then do something!?

Sorry but can't help you anymore! Frown | :(

PS. Are you Swedish? Big Grin | :-D

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Anonymous19-Nov-02 2:23

19-Nov-02 2:23

well... I ment something like:

1 get inner client area (prolly client area - minus some pixels),
2 get font height and
3 calculate full visible lines
--
PS: nej, men jag pratar en lite, jag heter Måak Smile | :)

Rickard Andersson²⁰19-Nov-02 3:46

Call MyDialog's UpdatejData() in Thread's worker function, Always give me out error.. What is the reason..?

19-Nov-02 3:46

Anonymous wrote:
PS: nej, men jag pratar en lite, jag heter Måak

Smile | :)

Be a member Moak!
BTW:
Ledsen, kan inte hjälpa dig! Frown | :(

(Sorry, can't help you)

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Sstar18-Nov-02 23:33

Sstar

18-Nov-02 23:33

UINT MyThreadProc( LPVOID pParam )
{
CMyDataStructure* pObject = (CMyDataStructure*)pParam;

// do something with 'pObject'
}

// inside a different function in the program
.
.
pNewObject = new CMyObject;
AfxBeginThread(MyThreadProc, pNewObjectPointer);

In my application, the main structure is simply a Dialog window. I placed the Dialog's pointer in the pObject and call the AfxBeginThread(MyThreadProc, pNewObject), however it always give me out run-time error when the Thread come to this line 'MyDialogPointer->UpdateData(false)'.

However if I replaced the line 'AfxBegnThread(MyThreadProc, pNewObject)' with MyThreadProc(pNewObjectPointer), no error come out.

Can anybody help me figure out what is the reason for it? And what should I do to sucessfully Perform UpdateData() of the Dialog by using Thread? Confused | :confused:

Re: Call MyDialog's UpdatejData() in Thread's worker function, Always give me out error.. What is the reason..?

Hans Ruck19-Nov-02 2:20

Hans Ruck

19-Nov-02 2:20

Sstar wrote:
I placed the Dialog's pointer in the pObject

That pointer should be allocated on the heap. Is your dialog staticly declared in the main thread?

rechi

Re: Call MyDialog's UpdatejData() in Thread's worker function, Always give me out error.. What is the reason..?

Rickard Andersson²⁰19-Nov-02 3:54

Re: Call MyDialog's UpdatejData() in Thread's worker function, Always give me out error.. What is the reason..?

19-Nov-02 3:54

Bogdan Rechi wrote:
That pointer should be allocated on the heap

Why?
He allocate memory in a function and then pass the address to that memory in AfxBeginThread (parameter to the thread func). In the thread function he create a new pointer (not on the heap) which will be assigned to the address that argument points to!?

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Hans Ruck19-Nov-02 4:00

Hans Ruck

19-Nov-02 4:00

The pointer arriving in the thread function is correct. But the structure it points to has a pointer member (probably a CDialog *) which is not allocated on the heap! That one is the pain, and it doesn't appear in his posting.

rechi

Re: Call MyDialog's UpdatejData() in Thread's worker function, Always give me out error.. What is the reason..?

Gary R. Wheeler20-Nov-02 14:30

Gary R. Wheeler

20-Nov-02 14:30

Each thread has its own message map. As a result, you can't pass MFC objects that refer to windows between threads. The best you can do is pass the window handle between threads.

Software Zen: delete this;

Problem regarding MSChart activex control

Chanda.com18-Nov-02 23:18

Chanda.com

18-Nov-02 23:18

I want to change value of y axix
i have tried following code

for(int x = 1 ; x < 10; x++)
{
m_Chart.SetColumn(x);
CString str1;
str1.Format("%d",x);
m_Chart.SetColumnLabel(str1);
}

but it doesnt work can anybody help me? thanx in advance
bye chan

How do I make it?

MFC is the Best18-Nov-02 23:12

MFC is the Best

18-Nov-02 23:12

hello @all,

i have a mdi program. in the mainframe you have for example:

File -> Close

i would like to hide 'Close' to the users until the correct password entered.
enter password:

View -> Password

the 'Close' should not be gray or something like that. the user should not see that there is something like the 'Close', until he enter the right password.

i hope you can help me.

thank you very much

MFC

Re: How do I make it?

Iain Clarke, Warrior Programmer18-Nov-02 23:41

Iain Clarke, Warrior Programmer

18-Nov-02 23:41

Off the top of my head, you could have a ON_COMMAND_UPDATE for the mdi child (which is where the
close command ends up) and use pCmdUI->SetText (m_bCanClose ? "Close" : "Password") to change the
text. You would also need a command handler to change the behaviour between password entry and the
normal closing.

For a "proper" app, you should load the menu strings from a resource rather than hardwired as above,
but you get the idea?

Iain.

Re: How do I make it?

MFC is the Best19-Nov-02 0:11

MFC is the Best

19-Nov-02 0:11

thanks for reply.

i think i know what you mean, but i don´t know, how i should program it.
can you give me an example or explain it in more detail?

thank you very much

mfc

Re: How do I make it?

Anonymous18-Nov-02 23:42