Tristate checkbox in tree - C / C++ / MFC Discussion Boards

Re: How to change static text on a property page clicking on command button.?

V.10-Aug-04 0:08

10-Aug-04 0:08

try,

((CWnd*)GetDlgItem(YOUR_STATIC_ID))->SetWindowText("the text");

good luck.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

use ProgressCtrl

fatidarya9-Aug-04 22:30

fatidarya

9-Aug-04 22:30

Hi,
Please help me!
How use ProgressCtrl to present runing program in another main form?
Thanks

Re: use ProgressCtrl

Antti Keskinen10-Aug-04 0:23

Antti Keskinen

10-Aug-04 0:23

You need to do what ? Could you be a bit more specific ?

If you need to use a progress control, familiarize yourself with CProgressCtrl class in MFC. This class represents a progress control that can be stepped through to represent the advances during a lenghty operation.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Re: use ProgressCtrl

David Crow10-Aug-04 3:18

David Crow

10-Aug-04 3:18

Unless you know how long the other program is going to run and how long it has run (e.g., it has run 13 of 17 minutes, so the control will reflect 76% completion), a progress control is of no use here. Make sense?

You might want to further explain what you are after.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Image processing

nyquisttt9-Aug-04 22:29

nyquisttt

9-Aug-04 22:29

I want to open an image sequence or an avi file, and i want to process it frame by frame. Then i will show the result in a window (i mean in a dialog ).

How can i do this in mfc? The first step is, i will open an avi file and play it on the screen (in a window).

Re: Image processing

*Dreamz10-Aug-04 3:13

*Dreamz

10-Aug-04 3:13

Have you tried CAnimateCtrl ?

CWebBrowser Help with Navigate function

ramingo9-Aug-04 22:11

ramingo

9-Aug-04 22:11

I have a CWebBrowser2 control on my dialog. I navigate it in a worker thread.
It works on mostly computers, but on a few computers it can't browse the URL content.
I have monitored these status:

"NavigateError"
"NavigateComplete2"
"DownloadComplete"
"DocumentComplete"

On those computer that the CWebBrowser2 control refuse to work there is no "NavigateError", but after "DownloadComplete" there is nothing to happen, so I think there is something wrong in the display process, but I have no idea about the wrong and how to solve it. (winXP,win2k, ADSL)

Any suggestions?

Tristate checkbox in tree

alfa_aquila9-Aug-04 22:10

alfa_aquila

9-Aug-04 22:10

Hi,
I have defined a new TreeCtrl in my project with checkboxes. What I would like to do is, that these checkboxes have a third state. Not only checked and not checked but also, the third state from the normal checkboxes (checked but disabled).
Is there any way to do this without bitmaps??? Confused | :confused:

Thank you in advance!
Xia.

Memory leaks with DAO?

george ivanov9-Aug-04 22:08

george ivanov

9-Aug-04 22:08

I have constant connection to the .mdb '97 file and use local variables for executing temporary queries:

CDaoQueryDef query(&db);
query.Create("", NULL);
query.SetSQL(strSQL);
query.Execute(strSQL);
...
query.SetSQL(strSQL);
query.Execute(strSQL);

When i execute 1000 INSERT/DELETE statement, I have more than 35MB memory lost, but when I comment just the execution lines, I have no memory losts.
Is this some DAO enternal caching that may allocate memory, cause I can't find any other reason?

were rgrtgrtvrtrt rtrtb brt tyuhjghj hbhbnh hnjm 1234567?

Problem in FILETIME

SSD_9-Aug-04 21:36

SSD_

9-Aug-04 21:36

i wrote the following code

FILETIME ftNow;
SYSTEMTIME ftSys;
FILETIME ftTemp;

GetSystemTimeAsFileTime( &ftNow );

FileTimeToSystemTime(&ftNow,&ftSys);
SystemTimeToFileTime(&ftSys,&ftTemp);

here the problem is
ftTemp.dwLowDateTime != ftNow.dwLowDateTime
why?
but if i use
CoFileTimeNow(&ftNow) instead of GetSystemTimeAsFileTime( &ftNow );
the code works fine
why?

does any one know about it?
how can i get the actual file time as ftNow from the system time.

Re: Problem in FILETIME

David Crow10-Aug-04 3:34

David Crow

10-Aug-04 3:34

In either case, the wMilliseconds member of the SYSTEMTIME structure is the same. Since the GetSystemTimeAsFileTime() function does not need granularitry beyond milliseconds, the extra value can be ignored.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Heap Allocation in Member Initialization List

Johann Gerell9-Aug-04 21:20

Johann Gerell

9-Aug-04 21:20

Is that considered good or bad?

I just read a paper by Bjarne, where he used

Vector::Vector(int i) : sz(i), v(new int[i]) { }

which I never do myself.

If heap allocation is needed, then I initialize the pointer with NULL in the member initialization list (MIL) and allocate the memory with new in the ctor body. But if you're using standard compliant tools that throws correctly if new fails, then it's perhaps OK to do it in the MIL.

Any thoughts on this?

--
The Blog: Bits and Pieces

Error in CBT_HOOK function

fu09-Aug-04 20:42

fu0

9-Aug-04 20:42

i write a global CBT_HOOK function in a win32 DLL ,and i want to send a message to the DLL's calling windows.But it doesnt work. Here is my code:

HWND hCallWnd = NULL;   // a global var to save the Dll's Caller<br />
LRESULT CALLBACK CbtProc(int nCode,WPARAM wParam,LPARAM lParam)<br />
{<br />
   switch(nCode)<br />
   {<br />
      case HCBT_CREATEWND: SendMessage(hCallWnd,MyMsgID,0,0); // to Send a msg<br />
      break;<br />
   }<br />
   return CallNextProc(nCode,...);<br />
}<br />
void InstallHook(HWND hcallwnd)<br />
{<br />
   SetWindowsHookEx(WH_CBT,CbtProc,DllHandle,0);  // set a global hook<br />
   hCallWnd = hcallwnd;            // save the Caller's handle<br />
}

the Error is : in InstallHook() function,the hCallWnd's value is correct. But in CALLBACK CbtProc() function, the hCallWnd's value is always ZERO! so my SendMessage() doesnt work at all.
Who can point out reason ?

Re: Error in CBT_HOOK function

Mike Beckerleg10-Aug-04 5:38

Mike Beckerleg

10-Aug-04 5:38

The DLL is loaded into the address space of each process and each process gets a separate copy of the global variable. You need to put hCallWnd into a shared partition.

See this article[^].

How to know the current logon user is Administrator or Limited user?

ErisonWu9-Aug-04 20:29

ErisonWu

9-Aug-04 20:29

Is there any function to know that the current logon user is Administrator or Limited user?

Jesa

Re: How to know the current logon user is Administrator or Limited user?

Amarelia9-Aug-04 22:57

Amarelia

9-Aug-04 22:57

Hi I think this will help you...Buffer in this function will be having all informatin that you want...

1. NetUserGetInfo()
2. GetUserName (Win API)

"Most of the failures in their life are the people are those who don't how near they were from the solution"

- Mahesh Amarelia

Gujarat
India

Re: How to know the current logon user is Administrator or Limited user?

ErisonWu10-Aug-04 23:10

ErisonWu

10-Aug-04 23:10

I survey the MSDN for the two function,

I think the problem will be solved by the two function.

But I need more time to realize the usage for the two function.

Anyway, you really help me a lot! Thanks Smile | :)

Jesa

Re: How to know the current logon user is Administrator or Limited user?

Juha Silmujarvi10-Aug-04 1:27

Juha Silmujarvi

10-Aug-04 1:27

Years ago I had the same problem, how to know user has admin rights if admin's user name is e.g "john" or if the user name is admin, does s/he really have those privileges ? I solved the problem by opening ServiceControlManager's database requesting SC_MANAGER_ALL_ACCESS rights. If it won't open, user is not an admin, if it opens user is really an admin.

I don't know how correct way this is to solve the problem, but it worked fine, and I think it is also rather simple way to detectuser's admin-level rights.

BOOL XYZ::IsUserAdmin(){

SC_HANDLE hSC;
ENUM_SERVICE_STATUS enumsstat;
hSC=::OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS);

if(hSC==NULL){
DWORD dwErr;
dwErr=GetLastError();
char szMsg[300]="";

switch(dwErr){
case ERROR_ACCESS_DENIED:
return FALSE;
break;
case ERROR_DATABASE_DOES_NOT_EXIST:
wsprintf(szMsg,"ServiceControlManager Database doesn't exist");
break;

case ERROR_INVALID_PARAMETER:
wsprintf(szMsg,"Invalid parameter while executing OpenSCManager()");
break;

default:
wsprintf(szMsg,"Error when executing OpenSCManager(), Error code is %ld",(long) dwErr);
break;
}

AfxMessageBox(szMsg);
return FALSE;
}

::CloseServiceHandle(hSC);
return TRUE;
}

Re: How to know the current logon user is Administrator or Limited user?

ErisonWu10-Aug-04 23:03

ErisonWu

10-Aug-04 23:03

Thanks for your answer!
This way works fine Smile | :)

Jesa

find the current logged on user

Anonymous9-Aug-04 20:13

Anonymous

9-Aug-04 20:13

hi all!!

i want to develop an application which first checks whether the user is Administrator or any other user.
If the user is not administrator, i want to find the name of the user
how do i proceed?

Re: find the current logged on user

parths9-Aug-04 20:26

parths

9-Aug-04 20:26

1. GetUserName (Win API)
2. Env Variable USERNAME

"It was when I found out I could make mistakes that I knew I was on to something."
-Ornette Coleman

"Philosophy is a study that lets us be unhappy more intelligently."
-Anon.

what is usual gamma correction value for generic printer?

baboguru9-Aug-04 19:48

baboguru

9-Aug-04 19:48

i tried to search gamma value for printer, but i only found one for CRT, NTSC, PAL and stuff, not printer.

and i guess win32 api has "Getting printer's gamma correction factor" func or something similar... Confused | :confused:

does anyone know? Confused | :confused:

thanks in advance~

Parallel Port Question

zahid_ash9-Aug-04 19:44

zahid_ash

9-Aug-04 19:44

HI,

How can i read n write uing parallel Port

can any body tell me. with sample plz
thanx

Regards.

Re: Parallel Port Question

Antti Keskinen9-Aug-04 21:22

Antti Keskinen

9-Aug-04 21:22

There are numerous examples here on Code Project about the programming of serial and/or parellel port.

Here's one of them, showing you how to control LED's with parellel port. The article is written by Jaygiri. The article[^].

Read the article through, and you will understand more of how the parellel port works. For even more detailed information, see this article[^]. It's written for C#, but the technical reference at the start is essential.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Re: Parallel Port Question

zahid_ash9-Aug-04 21:33

zahid_ash

9-Aug-04 21:33

thay all show how to write data there ,

but i also read data from there send by device

tll me abut read
thanx

Regards.

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