CDC::TransparentBlt - C / C++ / MFC Discussion Boards

Re: Pointer to DWORD

DuFF8-Apr-03 15:21

DuFF

8-Apr-03 15:21

I tried this:

DWORD exitCode;<br />
	BOOL getcode = GetExitCodeProcess(winKazaa, &exitCode);<br />
	BOOL terminate = TerminateProcess(winKazaa, exitCode);

but it didn't work. Is there something I'm still doing wrong?

Re: Pointer to DWORD

Taka Muraoka8-Apr-03 15:27

Taka Muraoka

8-Apr-03 15:27

Sigh...

Ignore my previous post. I should really read the question properly before answering these things Frown | :-(

I just tried compiling your sample and it worked fine!

The compiler error suggests that the problem is with winKazaa, not exitCode (assuming it is a HANDLE). You may be pulling in a header file that defines one of the functions you're calling with a different parameter list (!)

Software is everything. It also sucks. Charles Fishman [^]

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Automation compliant COM Vs ActiveX

devvvy8-Apr-03 12:59

devvvy

8-Apr-03 12:59

Hi there. Is there a quick answer to this following question:

What's the difference between automation compliant COM and ActiveX component.

Thanks

norm

Re: Automation compliant COM Vs ActiveX

J. Dunlap8-Apr-03 14:02

J. Dunlap

8-Apr-03 14:02

Nothing!

"Do unto others as you would have them do unto you." - Jesus

"An eye for an eye only makes the whole world blind." - Mahatma Gandhi

Re: Automation compliant COM Vs ActiveX

Anonymous8-Apr-03 17:57

Anonymous

8-Apr-03 17:57

"Nothing" as in "No difference"?

I just want to reconfirm this. Thanks

Re: Automation compliant COM Vs ActiveX

J. Dunlap8-Apr-03 18:01

J. Dunlap

8-Apr-03 18:01

ActiveX is just a fancy name for COM.

"Do unto others as you would have them do unto you." - Jesus

"An eye for an eye only makes the whole world blind." - Mahatma Gandhi

Application aborts Windows shutdown

RaiderCE8-Apr-03 12:35

RaiderCE

8-Apr-03 12:35

This problem has been driving me nuts for several days and I'm hoping a fresh mind out there can shed some light on this problem for me.

I've written an MFC application that can be installed as an NT service. Naturally, an NT service isn't terminated when the user logs out, however I do want to do a few things within the app when the user logs out or shuts down the computer. I'm able to determine when the user is logging out and perform the appropriate functionality by acting on the WM_QUERYENDSESSION and WM_ENDSESSION Windows messages.

Here's the problem. When the user logs out, everything is fine. They log back in and my service is still running as it should be. When they log back out or attempt to shutdown, it would appear that my application aborts the log off / shutdown. However, I'm always returning true to the WM_QUERYENDSESSION message. If I remove my handling of the WM_QUERYENDSESSION message, the same still happens.

It gets even weirder when I discovered that my application doesn't even receive the WM_QUERYENDSESSION message the second time I try logging out, but it DOES receive the WM_ENDSESSION message (with wParam = 0).

If I close my application, Windows is fine shutting down. If I restart my application, it works fine once before repeating the above.

Can someone save the remainder of my hair before I finish pulling it out?!

CDC::TransparentBlt

john john mackey8-Apr-03 11:55

john john mackey

8-Apr-03 11:55

Help with TransparentBlt()

I'm working from the CP example "Oscilliscope/StripChart Control" by Mark C. Malburg (http://www.codeproject.com/miscctrl/oscope.asp).

What I'm trying to adapt it to do is have several plots on the same chart PLUS the ability to turn off/on any one of the plots.

I am trying to use CDC::TransparentBlt(), but the compiler does not recognize this function. I looked at the AfxWin.h declaration for CDC and it is not there -- ...\microsoft visual studio\vc98\mfc\include\afxwin.h (VC++ 6.0)

I'm running VC++ 6.0, Win2000, Service pack ???
What do I have to do in order to get this to work?

Thanks (in advance for any help)
Johnny

Re: CDC::TransparentBlt

Brian Shifrin8-Apr-03 13:29

Brian Shifrin

8-Apr-03 13:29

May be this is just me, but I always thought that TransparentBlt is a member of ATL CDC ( atlgdi.h ?), but not MFC CDC (afxwin.h) at least at 6.0 level.

Either way whats wrong with using ::TransparentBlt(dc->GetSafeDC(),....);

How do I output the IP Address after getting computer name??

IrishSonic8-Apr-03 11:18

IrishSonic

8-Apr-03 11:18

Hiya I am writing a window sockets program. I can find loads of examples of setting the IP address and then displaying that, but I can not find out how to display the IP Address once I have got the computer name..I have this so far:

char szHostName[200];
struct hostent *host;

gethostname( szHostName,strlen( szHostName ));
host = gethostbyname( szHostName );

// now display the IP Address of the host??

I have seen the inet_addr function, but don't know how to use it..

Re: How do I output the IP Address after getting computer name??

Bartosz Bien8-Apr-03 11:28

Bartosz Bien

8-Apr-03 11:28

Example:

in_addr *addr = (in_addr*)*host->h_addr_list;<br />
<br />
CString s;<br />
s.Format("%d.%d.%d.%d", addr->s_b1, addr->s_b2, addr->s_b3, addr->s_b4);

Regards,
BB

Re: How do I output the IP Address after getting computer name??

IrishSonic8-Apr-03 12:26

IrishSonic

8-Apr-03 12:26

Hiya, thanks for that and tried it but it says that s_b1 is not a member of in_addr. Which it isn't.

I put it in exactly as suggusted. But S_un is the member of in_addr .i.e
addr->S_un

What can I do to fix this??

Thanks again,
grahamoj

Re: How do I output the IP Address after getting computer name??

Bartosz Bien8-Apr-03 13:09

Bartosz Bien

8-Apr-03 13:09

OK, I mispelled this. I guess you may use:

s.Format("%d.%d.%d.%d", addr->S_un.S_un_b.s_b1, addr->S_un.S_un_b.s_b2, addr->S_un.S_un_b.s_b3, addr->S_un.S_un_b.s_b4);

Regards,
BB

Re: How do I output the IP Address after getting computer name??

csc8-Apr-03 21:10

csc

8-Apr-03 21:10

Hi ... you may try this code snippet ....

the result should be something like 123.456.789.123 ...

hope it will help you

Wink | ;)

struct hostent * pHost = gethostbyname(szHostName);
if(pHost != NULL)
{
for(int i = 0; (pHost->h_addr_list[i]!= NULL); i++ )
{
CString csIP = "";
for(int j = 0; j < pHost->h_length; j++ )
{
if( j > 0 ) csIP += ".";

CString addr = "";
addr.Format("%u", (unsigned int)((unsigned char*)pHost->h_addr_list[i])[j]);
csIP += addr;
}
AfxMessageBox( csIP );
}
}

Re: How do I output the IP Address after getting computer name??

Dudi Avramov8-Apr-03 22:22

Dudi Avramov

8-Apr-03 22:22

use inet_ntoa fucntion:

char szIP[16];

struct hostent *host = gethostbyname( szHostName );
struct in_addr *InAddr = (struct in_addr*)host->h_addr_list[0];
strcpy(szIP,inet_ntoa(*InAddr));

Programming Graphic LCD Panels

#realJSOP8-Apr-03 9:37

#realJSOP

8-Apr-03 9:37

Anyone ever done this? Specifically, I have a crapload (well, five of the little beasties anyway) of 122x32 LCD panels that use the SED1520 controller, and I wanna play with them, maybe monitor case/cpu/gpu temperatures.

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Overloaded Methods & COM: ???

J. Dunlap8-Apr-03 9:17

J. Dunlap

8-Apr-03 9:17

When you use overloaded methods and generate a COM proxy, how do you access each overload of the method? Can you even do it? (I'm wanting to host script.)

"Do unto others as you would have them do unto you." - Jesus

"An eye for an eye only makes the whole world blind." - Mahatma Gandhi

Re: Overloaded Methods & COM: ???

Le centriste8-Apr-03 11:07

Le centriste

8-Apr-03 11:07

I don't think you can overload methods in COM.

Re: Overloaded Methods & COM: ???

J. Dunlap8-Apr-03 11:11

J. Dunlap

8-Apr-03 11:11

That's the point - what happens? But I suppose the answer is that only the default method def is used in the COM interface definition. (Sigh) Cry | :((

"Do unto others as you would have them do unto you." - Jesus

"An eye for an eye only makes the whole world blind." - Mahatma Gandhi

I found the answer! :-) :-)

J. Dunlap8-Apr-03 13:38

J. Dunlap

8-Apr-03 13:38

I found the answer! I tried it out - made a test dll, compiled it, ran it thru RegAsm.exe, and OLE-viewed the resulting typelib.

The answer? If you make a COM proxy for a class/interface with overloaded functions, the function is listed once for each overload, appended with "_" & a number.

Big Grin | :-D

That's what I was hoping for!!! Big Grin | :-D

Example:

//1st overload
[id(0x60020004)]
BSTR OLoad([in] long nInput);

//2nd overload - notice the custom attribute
[id(0x60020005),
custom(0F21F359-AB84-41E8-9A78-36D110E6D2F9, OLoad)]
BSTR OLoad_2([in] BSTR sInput);

"Do unto others as you would have them do unto you." - Jesus

"An eye for an eye only makes the whole world blind." - Mahatma Gandhi

Re: I found the answer! :-) :-)

Le centriste8-Apr-03 18:05

Le centriste

8-Apr-03 18:05

Interesting.....

Preventing tree node from collapsing

Ravi Bhavnani8-Apr-03 8:39

Ravi Bhavnani

8-Apr-03 8:39

I'm trying to prevent the root node of my subclassed CTreeCtrl from being collapsed. The root node is guaranteed to have children. I've reflected TVN_ITEMEXPANDING to the control and am returning TRUE in its handler to prevent the root from being collapsed, but the user seems to be able to collapse it anyway.

BOOL CProjectTreeCtrl::OnItemExpanding
     (NMHDR* pNMHDR, LRESULT* pResult)
{
  // Don't allow the project root to be collapsed
  NMTREEVIEW* pNMTreeView = (NMTREEVIEW *) pNMHDR;
  HTREEITEM hItem = pNMTreeView->itemNew.hItem;
  if (pNMTreeView->action == TVE_COLLAPSE)
     if (hItem == m_hRoot)
        return (TRUE);          // breakpoint reached
  return (FALSE);
}

I can get around the problem by handling TVN_ITEMEXPANDED, but that's ugly because the node collapses then expands.

Any clues as to what I'm doing wrong? Thanks,

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Preventing tree node from collapsing

Nick Parker8-Apr-03 11:27

Nick Parker

8-Apr-03 11:27

Ravi Bhavnani wrote:
Any clues as to what I'm doing wrong? Thanks,

Nope, but here is a thought, could you use the TreeView_Expand Macro?
ms-help://MS.PSDK.1033/shellcc/platform/commctls/treeview/macros/treeview_expand.htm[^](In the Oct. 2002 SDK).

-Nick Parker

Re: Preventing tree node from collapsing

Ravi Bhavnani8-Apr-03 11:34

Ravi Bhavnani

8-Apr-03 11:34

Thanks, Nick but I'm already able to re-expand the collapsed node by calling Expand(). I was hoping to prevent the about-to-be-collapsed node from collapsing.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Preventing tree node from collapsing

Bartosz Bien8-Apr-03 11:33

Bartosz Bien

8-Apr-03 11:33

You have to set *pResult = TRUE; and the notification handler has to be void!

void CProjectTreeCtrl::OnItemExpanding(NMHDR* pNMHDR, LRESULT* pResult)<br />
{<br />
    NMTREEVIEW *pNMTV = (NMTREEVIEW*)pNMHDR;<br />
    *pResult = pNMTV->action == TVE_COLLAPSE && pNMTV->itemNew.hItem = m_hRoot;<br />
}

Regards,
BB

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