C / C++ / MFC

KingsGambit29-Dec-09 0:36

29-Dec-09 0:36

What is a dbf file? Is it a database file?

kir_MFC29-Dec-09 2:05

kir_MFC

29-Dec-09 2:05

yes

kir_MFC

mav@octaval29-Dec-09 2:10

mav@octaval

29-Dec-09 2:10

Are you talking about the ancient dBase database file?

--

Si dos montan un caballo, uno debe ir detrás.

dxlee29-Dec-09 3:21

dxlee

29-Dec-09 3:21

There are information on dbf file structures available on the web. I suggest you do a search to find the info.

David Crow29-Dec-09 3:34

David Crow

29-Dec-09 3:34

ODBC would probably be the easiest. If you are using MFC, check out the CRecordset and CDatabase classes.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Two Dialogs in Application class

Hamid_RT29-Dec-09 19:34

Hamid_RT

29-Dec-09 19:34

Did you see Database[^]?

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Anu_Bala28-Dec-09 22:46

Anu_Bala

28-Dec-09 22:46

Hi,
As i want to display two dialogs and im hiding mainframe.Just i will do all this operations through the buttons in these two dialogs.
So i did in App class as follow

pMainFrame->ShowWindow(SW_HIDE/*m_nCmdShow*/);
	pMainFrame->UpdateWindow();		
	pMainFrame->AlarmBanner();  //FirstDailog	
	pMainFrame->ToolTab(); //Second dialog

In Mainframe.cpp

void CMainFrame::AlarmBanner()
{
	CAlarmBanner *oAbanner;
	oAbanner = new CAlarmBanner;
	oAbanner->Create(IDD_ALARMBANNER,this);
	oAbanner->ShowWindow(SW_SHOW);
}

void CMainFrame::ToolTab()
{
	CToolTab *otoolbar;
	otoolbar = new CToolTab;
	otoolbar->Create(IDD_TOOLBAR_DIALOG,this);
	otoolbar->ShowWindow(SW_SHOW);

}

My problem,when i started it is continously flickiering..even it does not open properly.
Wats the mistake..what can i do to avoid that?
By commenting any dialog calling code,the other one works perfectly.But i want to display this two dialogs as one in top of screen and other one in left side of screen.

Anu

Re: Two Dialogs in Application class

KingsGambit28-Dec-09 23:28

Re: Two Dialogs in Application class

28-Dec-09 23:28

I could not figure out why exactly it is flickering but it seems following points worth considering:

1) pMainFrame->UpdateWindow(); call looks unnecessary.
2) Heap allocations made by using new operator need to be deallocated by using delete operator otherwise results in memory leak.
3) The dialogs need to be explicitly destroyed by calling DestroyWindow() function.

Anu_Bala28-Dec-09 23:59

Anu_Bala

28-Dec-09 23:59

Now its working .What i changed is.
I gave setwindowpos in OnWindowPosChanging(WINDOWPOS* lpwndpos) in each dialog.Now i replaced that in to OnInitDialog().

Anu

Re: Two Dialogs in Application class

Nelek28-Dec-09 23:55

Nelek

28-Dec-09 23:55

Flickering could be due to a endless try to refresh the dialogs.

In addition to the previous answer I would take a look on the OnPaint, UpdateWindow or similar messages, and on the interactions between one and the other dialog as well (if there are such interactions), the problem could be there.

I mean...
A updates and try to update B, then B updates and try to update A, so it starts another time and has no end.

Regards.
--------
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unistd.h

mortaza mardani28-Dec-09 21:50

mortaza mardani

28-Dec-09 21:50

hi every one
i need to implemtion of unistd.h in the windows
would you help me please?
Thanks a lot

Re: unistd.h

Rajesh R Subramanian28-Dec-09 22:09

Rajesh R Subramanian

28-Dec-09 22:09

Cygwin?

“Follow your bliss.” – Joseph Campbell

Re: unistd.h [modified]

CPallini28-Dec-09 22:16

CPallini

28-Dec-09 22:16

Why do you need it?
Could you use Cygwin [^] environment?
Smile | :)

[added]
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$Shucks | :-\$
[/added]

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

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[My articles]

Re: unistd.h

mortaza mardani31-Dec-09 9:27

mortaza mardani

31-Dec-09 9:27

I didn't use cygwin alredy and I want to find a solution except this. if there isn't other way please tell me how can i use it?
thanks a lot.

CreateProcessAsUser

sashoalm28-Dec-09 21:39

sashoalm

28-Dec-09 21:39

How do I get the hToken needed for CreateProcessAsUser? I have a DLL that is loaded runs from the context of user1 and then from user2. From user2, I want to create a process as user1.

From MSDN:

BOOL WINAPI CreateProcessAsUser(
  __in_opt     HANDLE hToken,
  __in_opt     LPCTSTR lpApplicationName,
  __inout_opt  LPTSTR lpCommandLine,
  __in_opt     LPSECURITY_ATTRIBUTES lpProcessAttributes,
  __in_opt     LPSECURITY_ATTRIBUTES lpThreadAttributes,
  __in         BOOL bInheritHandles,
  __in         DWORD dwCreationFlags,
  __in_opt     LPVOID lpEnvironment,
  __in_opt     LPCTSTR lpCurrentDirectory,
  __in         LPSTARTUPINFO lpStartupInfo,
  __out        LPPROCESS_INFORMATION lpProcessInformation
);

What I want to do is something like this:

1. user1 process loads my DLL
2. my DLL gets the current process hToken (???this is the part i don't get???)
3. my DLL stores that in a txt file.
4. user1 process closes

5. user2 process starts and loads my DLL
6. my DLL reads all the needed data from txt file
7. my DLL starts a process as user1.

user2 process is always guaranteed to run only *after* user1 process. They don't run simultaneously.

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

KingsGambit28-Dec-09 22:06

28-Dec-09 22:06

LogonUser() function can be used to get the token.

sashoalm28-Dec-09 22:20

sashoalm

28-Dec-09 22:20

I don't have the password for the user, which LogonUser requires.

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

KingsGambit28-Dec-09 22:25

28-Dec-09 22:25

In that case you can enumerate all processes to find out the PID for explorer.exe

Use OpenProcess() API to get process handle for explorer.

Use OpenProcessToken() API to get the token handle for explorer.exe.

Use the this token handle in the CreateProcessAsUser() API.

It would work because explorer.exe runs in the logged-in user's account.

sashoalm28-Dec-09 22:36

sashoalm

28-Dec-09 22:36

That might work, but it's inherently an unstable solution, mostly because user1 might be or not be the same user as explorer.exe. It's not guaranteed to be the logged on user. It's just whichever process loaded my DLL first.

Wouldn't it be better to use GetCurrentProcess() instead, while my DLL is loaded in user1 process, and then use OpenProcessToken?

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

KingsGambit28-Dec-09 22:37