C / C++ / MFC Discussion Boards

sunilkumar_prog9-Mar-05 20:15

9-Mar-05 20:15

Hi,

I developed a control panel applet and placed the '.cpl' file in "C:\i soft".
I added a new key under :
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Control
Panel\Cpls as ES REG_SZ C:\i soft\hvcescp.cpl

Now, this applet is displaying in the control panel and working fine,but the
icon (that I gave in resource file) is not getting displayed.
If the ".cpl" file is moved to a folder whose name does not contain space characters (e.g.: "isoft"), icon is getting displayed in control panel. Then also, applet is working when I double click on control panel item.

I am responding to the CPL_NEWINQUIRE message with the proper icon ID.
What to be done ? Is there anything wrong with Registry entry given above?

Sunil kumar.A.V., SSE.

Re: Control panel applet icon

David Crow10-Mar-05 5:18

David Crow

10-Mar-05 5:18

sunilkumar_prog wrote:
I added a new key under :
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Control
Panel\Cpls as ES REG_SZ C:\i soft\hvcescp.cpl

Since spaces are involved, have you included the path in quotation marks?

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

Re: Control panel applet icon

sunilkumar_prog12-Mar-05 0:49

sunilkumar_prog

12-Mar-05 0:49

Thanks for the reply.
We tried both single & double quotation marks.Still it is not working.

hDC,undeclared identifier error

Member 16927359-Mar-05 20:03

Member 1692735

9-Mar-05 20:03

//Set up text color

switch(suit){
case (SUIT_CLUBS) : SetTextColor(hDC, C_BLACK); strcpy(strSuit,"Clubs"); break;
case (SUIT_DIAMONDS) : SetTextColor(hDC, C_RED); strcpy(strSuit,"Diamonds"); break;
case (SUIT_HEARTS) : SetTextColor(hDC, C_RED); strcpy(strSuit,"Hearts"); break;
case (SUIT_SPADES) : SetTextColor(hDC, C_BLACK); strcpy(strSuit,"Spades"); break;
I am a novice and would appreciate suggestions on how to fix this, The program has drop down windows i would like to change the color of the text in now it is all black. Thanks Confused | :confused:

Re: hDC,undeclared identifier error

Branislav10-Mar-05 0:28

Branislav

10-Mar-05 0:28

Insert hDC = GetDC( hWnd ) before switch.
Be careful with strcpy function:
- no end of string
- lenght may overflow

Hi... Great People....

deldeep9-Mar-05 19:16

deldeep

9-Mar-05 19:16

I want to use command line in mfc.....but i don't know how can i fetch the
parameter of command line through mfc.......if there is any good article related to command line plz reply me.

Thanx.

keep smilling.....b'coz smile is the shortest distance between people....

Re: Hi... Great People....

Tareq Ahmed Siraj9-Mar-05 20:11

Tareq Ahmed Siraj

9-Mar-05 20:11

Look for CCommandLineInfo for the MFC way in the MSDN docs ... You can also use ::GetCommandLine() Win32 API for the passed command line. Hope this helps.

- tareq

Re: Hi... Great People....

deldeep11-Mar-05 18:42

deldeep

11-Mar-05 18:42

Thanx sir.....

keep smilling.....b'coz smile is the shortest distance between people....

ReadDebuggeeMemory

Aleksan9-Mar-05 19:16

Aleksan

9-Mar-05 19:16

I want use this function to view STL vector in watch window of Visual Studio debugger.

the function realisation lookes like this:

HRESULT WINAPI INT_VECTOR_TYPE_Evaluate( DWORD dwAddress, DEBUGHELPER *pHelper, int nBase, BOOL bUniStrings, char *pResult, size_t max, DWORD reserved )
{
std::vector<int,std::allocator<int> > vct;

DWORDLONG qwRealAddress;
DWORD nGot;

if (pHelper->dwVersion<0x20000)
{
// Visual C++ 6.0 version
if(pHelper->ReadDebuggeeMemory( pHelper,
dwAddress,
/*what size i must pass here */
, &vct, &nGot )!=S_OK)
/* at this point we have "access violation"
return E_FAIL;
}

return 0;
}

In sample from MSDN there is structure and all workes ok.
What about vectors?

help needed SafeArrayAccessData

arusmemon9-Mar-05 18:25

arusmemon

9-Mar-05 18:25

i am declearing a BYTE* say pDest
then i call
SafeArrayAccessData(vImage->parray , (void HUGEP**)&pDest);

my q is weather to just call

SafeArrayUnaccessData(vImage->parray);
SafeArrayDestroy(vImage->parray);

or should i also delete pDests ? by delete statements
please help me out
waiting for responce...

Re: help needed SafeArrayAccessData

Tareq Ahmed Siraj9-Mar-05 19:40

Tareq Ahmed Siraj

9-Mar-05 19:40

I dont think you need to delete pDest ... only SafeArrayUnaccessData and SafeArrayDestroy is sufficient. Please correct me if I am mistaking ... Hope this helps.

- tareq

How to Transfer the image Captured using Screen Capture Code to other machine

karmegakumar9-Mar-05 18:13

karmegakumar

9-Mar-05 18:13

hi frnds..

i got the code for SCREEN CAPTURE..Its working well..

now wat i need is HOW TO TRANSFER THAT CODE TO SOME OTHER MACHINE IN A LAN..

so plz frnds if u any cdoe for that send me..or if u have any suggestion plz tell me..

i will be looking forward for ur replies..

thank u

with luv
kar

Karmegakumar.A B.Tech IT
Amrita Institutions
Coimbatore

Re: How to Transfer the image Captured using Screen Capture Code to other machine

spinoza16-May-05 21:42

spinoza

16-May-05 21:42

Look at the code below you can get the CxImage class from An article from Davide Pizzolato. Use some Transfer function to transfer the buffer to the client and decode the image and show it.

BYTE* MyIOCP::GetJPGCompressedDesktopCapture(UINT &nArraySize, int nWidth, int nHeight, BYTE nquality)
{
// get the desired window from dialog box
HWND hwnd=::GetDesktopWindow();
// get window size
CRect r;
::GetWindowRect(hwnd,&r);

int nX, nY, nX2, nY2; // coordinates of rectangle to grab
int xScrn, yScrn; // screen resolution
nArraySize=-1;
BYTE* retbuffer=NULL;

// prepare the DCs
HDC dstDC = ::GetDC(NULL);
HDC srcDC = ::GetWindowDC(hwnd); //full window (::GetDC(hwnd); = clientarea)
HDC memDC = ::CreateCompatibleDC(dstDC);

nX = r.left;
nY = r.top;
nX2 = r.right;
nY2 = r.bottom;
// get screen resolution
xScrn = GetDeviceCaps(srcDC, HORZRES);
yScrn = GetDeviceCaps(srcDC, VERTRES);
//make sure bitmap rectangle is visible

if (nX < 0)
nX = 0;

if (nY < 0)
nY = 0;

if (nX2 > xScrn)
nX2 = xScrn;

if (nY2 > yScrn)
nY2 = yScrn;

// nWidth = nX2 - nX;
// nHeight = nY2 - nY;

// create a bitmap compatible with the screen DC

HBITMAP bm =::CreateCompatibleBitmap(dstDC, nWidth, nHeight);
HBITMAP oldbm = (HBITMAP)::SelectObject(memDC,bm);

// copy the screen and resize to the bitmap

//TRACE("%i,%i",nWidth,nHeight);
// Set Correct Stretchmode
::SetStretchBltMode(memDC,HALFTONE);
::StretchBlt(memDC,0,0,nWidth,nHeight,srcDC,nX,nY,nX2,nY2,SRCCOPY);

//::BitBlt(memDC, 0, 0, nWidth, nHeight, srcDC, nX,nY , SRCCOPY);

// Create a JPG image From the bitmap..

CxImage newimage(CXIMAGE_FORMAT_JPG);
newimage.CreateFromHBITMAP(bm);

// free objects
DeleteObject(SelectObject(memDC,oldbm));
DeleteObject(memDC);

// Encode the image to the memory

CxMemFile MemFile;

//newimage.SetCodecOption(0x10,CXIMAGE_FORMAT_JPG);

// Change so that we dont have a transparent background.
newimage.SetTransIndex(-1);

// If Color change it to 24 bit bitmap.
if (!newimage.IsGrayScale())
newimage.IncreaseBpp(24);

newimage.SetJpegQuality(nquality);
MemFile.Open();

// You have to encode and decode it to compress it in reality.
// ?? Very very strange..
BOOL bRet=FALSE;
if(newimage.Encode(&MemFile,CXIMAGE_FORMAT_JPG))
{
if(MemFile.Seek(0,SEEK_SET))
bRet=newimage.Decode(&MemFile,CXIMAGE_FORMAT_JPG);
}

nArraySize=(UINT)MemFile.Size();

if(bRet)
retbuffer=MemFile.GetBuffer();

// Close & Clean up
MemFile.Close();
newimage.Destroy();
return retbuffer;
}

Memory Problems with new, delete and CObArray

NeoHobbit9-Mar-05 16:54

NeoHobbit

9-Mar-05 16:54

Hi. I am having problems with deleting objects from a CObArray not freeing up the memory.

NB: The code has been simplified to show only the key points.

In the header

class CBelFileDetails : public CObject
{
public:
 CBelFileDetails ()
 {
  // Fill variables
 };
 ~CBelFileDetails () {};

 //Bunch of variables of type CString, DWORD and BOOL
};

In the Implementation

void RemoveArray (CObArray *pA)
{
 int j, Count;
 Count =  pA -> GetSize ();
 for (j = 0; j < Count; j++)
 {
  CObject* P = pA -> GetAt (j);
  if (P)
  {
   TRY
   {
    delete P;
    P = NULL;
   }
   CATCH_ALL (e)
   {
    e->ReportError ();
   }
   END_CATCH_ALL
  }
 }
 pA -> RemoveAll ();
}

void CMainFrame::OnTimer(UINT nIDEvent) 
{
 int j;
 CObArray FileDetailsArray;
 for (j = 0; j < NumOfFiles; j++)
 {
   CBelFileDetails *pFD = new CBelFileDetails ();
   // Fill in values
   FileDetailsArray.Add (pFD);
 }
 RemoveArray (&FileDetailsArray);
}

The problem is, if I watch the 'Mem Usage' in TaskManager it forever goes up. As if the memory is not being released. I run it in debug mode, and same thing happens. But when I close the application, no memory leaks are reported.

I am wondering if any of you have encountered the same problem and if so, how did you fix it?

Re: Memory Problems with new, delete and CObArray

Christian Graus9-Mar-05 17:05

Christian Graus

9-Mar-05 17:05

Have you stepped through this code to see if it does what you expect ?

I've never used CObjArray, so I can't comment directly. The Microsoft containers were only provided as a stopgap until the STL arrived. You really should just use a vector. You'd still have to delete pointers held in it, but you could easily write a functor and use for_each to do so.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

Re: Memory Problems with new, delete and CObArray

NeoHobbit9-Mar-05 17:14

NeoHobbit

9-Mar-05 17:14

I've walked through the code and it 'works' perfectly. The problem seems (well to me at least and a fellow workmate) that the problem is when I call delete. I watched the memory using the Visual C++ Memory debug window, and it all got killed to EE EF's as if the object was deleted fine. But in taskmanager, the mem usage did not shrink.

GetOpenFileName in a service

TheGreatAndPowerfulOz9-Mar-05 14:48

TheGreatAndPowerfulOz

9-Mar-05 14:48

I am attempting to use GetOpenFileName from a service on W2K and WXP. The service is set to interact with the desktop. The problem is that when the open dialog appears and the user selects the "Desktop" icon on the left panel of the open file dialog, it complains about "C:\Documents and Settings\LocalSystem\desktop" not existing. Note the "LocalDesktop" in that string. I want it to be the name of the current user.

So, how do I tell GetOpenFileName to use the currently logged-on user's context when using the open file dialog? Do I need to impersonate the logged-on user before calling GetOpenFileName? If so, how do I do impersonation WITHOUT asking for user credentials?

Some rudimentary example will suffice, you don't have to right the whole she-bang.

Thank you in advance.

ahz

Re: GetOpenFileName in a service

TheGreatAndPowerfulOz9-Mar-05 14:52

TheGreatAndPowerfulOz

9-Mar-05 14:52

After some research, I answered my own question:

OPENFILENAME op;
ZeroMemory(&op, sizeof(op));

op.lStructSize = sizeof(op);
op.hwndOwner = m_hWnd;
op.lpstrFilter = L"JavaScript Files (*.js)\0*.js\0VBScript Files (*.vbs)\0*.vbs\0All Files (*.*)\0*.*\0\0\0";
op.lpstrFile = m_wsFilePathBuf;
op.nMaxFile = cPathSize;
op.lpstrFileTitle = m_wsFileNameBuf;
op.nMaxFileTitle = cNameSize;
op.lpstrTitle = title.Length() ? title : L"Product Name Title";
op.Flags = OFN_DONTADDTORECENT | OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST | OFN_ENABLESIZING | OFN_EXPLORER | OFN_HIDEREADONLY;

bool impersonated = false;
DWORD processID;
if (ProcessIsRunning(L"someuserprocess.exe", processID))
{
HANDLE processHandle;
HANDLE token = 0, duptoken = 0;
BOOL result;
DWORD size = 0;
processHandle = ::OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_DUP_HANDLE, FALSE,processID);
result = ::OpenProcessToken(processHandle, TOKEN_QUERY | TOKEN_IMPERSONATE | TOKEN_DUPLICATE, &token);
result = result ? ::DuplicateToken(token, SecurityImpersonation, &duptoken) : FALSE;
impersonated = (result ? ::ImpersonateLoggedOnUser(duptoken) : FALSE) == TRUE;
}
BOOL result = GetOpenFileName(&op);
if (impersonated)
{
RevertToSelf();
impersonated = false;
}

Re: GetOpenFileName in a service

xxrl9-Mar-05 17:06

xxrl

9-Mar-05 17:06

Thanks for your sharing...
I studied more by this issue.
thanks very much ,i will remember this.
but do you have msn acount?

You are the best!Me too!

Re: GetOpenFileName in a service

Ryan Binns9-Mar-05 17:28

Ryan Binns

9-Mar-05 17:28

Good solution, just remember to close your handles when you're done. Also, a couple of points...

What if there is no user running the process you're checking for?
What if more than one user is running the process you're checking for? Do you use the right one?

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: GetOpenFileName in a service

TheGreatAndPowerfulOz10-Mar-05 10:23

TheGreatAndPowerfulOz

10-Mar-05 10:23

Ryan Binns wrote:
Good solution, just remember to close your handles when you're done.

yes, caught that and did it.

Also, a couple of points...
What if there is no user running the process you're checking for?

First, in the product I'm developing is an endpoint security product, so if the process queried is not running, the product considers that a fatal error and causes user's machine to reboot.

What if more than one user is running the process you're checking for? Do you use the right one?
Second the product I'm developing is not supported on FUS or TSERVER or CITRIX metaframe. wouldn't make sense in those environments.

Thanks for the comments.

get exe path

Marcus Spitzmiller9-Mar-05 14:07

Marcus Spitzmiller

9-Mar-05 14:07

i know this is easy, but i can't find or remember it right now....

my program is whatever.exe. from inside that program, how can i get the full path that this exe is running?

so, something that returns c:\program files\....\whatever.exe

Any ideas? my brain and search skills appear to be shot tonight...

Thanks!

Marcus Spitzmiller

"Why must life be so hard? Why must I fail at every attempt at masonry?" - Homer

Re: get exe path

Christian Graus9-Mar-05 14:47

Christian Graus

9-Mar-05 14:47

Pretty sure this is in the FAQ

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

Re: get exe path

Marcus Spitzmiller9-Mar-05 14:59

Marcus Spitzmiller

9-Mar-05 14:59

yeah - you were right. thanks for the info.

Marcus Spitzmiller

"Why must life be so hard? Why must I fail at every attempt at masonry?" - Homer

Re: get exe path

gamitech9-Mar-05 21:13

gamitech

9-Mar-05 21:13

have you tried :

GetModuleFileNameEx(GetCurrentProcess(),GetModuleHandle(0),szExe,sizeof(szExe));
or GetFilePath() function which requires the handle of the file .

gabby

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