Accessing Values from a DLL - C / C++ / MFC Discussion Boards

Re: Getting thread status programatically

Deian13-Mar-04 1:28

13-Mar-04 1:28

Well, ok, what if I have numerous threads? Let's say at least four? How to know if thread is paused or running? Any interesting approaches?

Re: Getting thread status programatically

Blake Miller17-Mar-04 8:09

Blake Miller

17-Mar-04 8:09

How about OpenThread and GetThreadContext.
Not sure what is in a CONTEXT, but I would suspect if it was the same from one call to the next, that the thread was suspended.

Need compact html rendering component for an mfc app

Jim Howard12-Mar-04 6:40

Jim Howard

12-Mar-04 6:40

Howdy,

I am writing a client side MFC application. I would like to be able to display a scrolling window that renders simple html. The main tags I need are <font>, <center>, <strong> and maybe <img>.

I don't want to use the MS Internet explorer control. That's like using a locomotive to push a shopping cart. My client doesn't want the dependancies and security issues that come with IE. I don't blame him a bit.

I know I have seen light weight html rendering controls for simple html text rendering, but I can't remember where I saw them.

Anyone have any suggestions?

TIA

Jim H

Re: Need compact html rendering component for an mfc app

David Crow12-Mar-04 6:59

David Crow

12-Mar-04 6:59

Since IE is already available on the machine, why not use it? While other renderers probably exist, can you guarantee that they have been thoroughly tested and are fully HTML compliant? Have you considerd CHtmlView? It's based on the IE server, but it plugs into an application almost seamlessly.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: Need compact html rendering component for an mfc app

Jim Howard12-Mar-04 7:06

Jim Howard

12-Mar-04 7:06

I've deployed commerical apps that use CHtmlView. It can work, but it's a hellish nightmare to test all the possible permutations and combinations of operating systems and versions of IE. My client also has legitimate security concerns about using IE.

If you need the full power of IE then using the MS browser object is fine.

I don't need anything like the power of IE. I just need to be able to nicely render some text. IE is massive overkill for this task.

Re: Need compact html rendering component for an mfc app

Joel Lucsy12-Mar-04 7:45

Joel Lucsy

12-Mar-04 7:45

HTMEngine at http://www.terrainformatica.com/htmengine/
QHTM at http://www.gipsysoft.com/qhtm/

--
Joel Lucsy

Re: Need compact html rendering component for an mfc app

Chris Richardson12-Mar-04 14:15

Chris Richardson

12-Mar-04 14:15

Well it's not exactly an HTML rendering engine, but the following control has support for a bunch of tags. I haven't looked at the source that I can remember, but you may be able to rip out it's core and use it for your own purposes.

http://www.codeproject.com/miscctrl/pptooltip.asp[^]

Chris Richardson

Accessing Values from a DLL

mike-o12-Mar-04 5:56

mike-o

12-Mar-04 5:56

Hey,

here's a good newbie question for everyone:

I'm currently using a 2d graph DLL that i got from codeproject:
CXGraph

And am running it on a split pane with a control panel the right. when the user clicks on the graph, i want to pull the value for that point on the graph out of the graph dll and access it in my project, but the click message seems to get caught in the graph function.

is there any way i can catch the mouseclick action in the main app?

Many Thanks,

Mike

"Facts are meaningless. You could use facts to prove anything that's even remotely true." --Homer J.

Re: Accessing Values from a DLL

JWood12-Mar-04 8:09

JWood

12-Mar-04 8:09

You could intercept it in your derived class then post it back to the MainWnd

AfxGetMainWnd()->PostMessage(...

My neighbours think I am crazy - but they don't know that I have a trampoline. All they see my head bobbing up and down over the fence every five seconds

Re: Accessing Values from a DLL

mike-o12-Mar-04 9:23

mike-o

12-Mar-04 9:23

thanks!

that's what i was looking for

"Facts are meaningless. You could use facts to prove anything that's even remotely true." --Homer J.

How to disable the dropdown arrow of a combo box?

bin892212-Mar-04 5:30

bin8922

12-Mar-04 5:30

Hello, there,
I am currently working on a project. There is a combo box. I'd like to know how I can disable the dropdown arrow of it or hide the dropdown arrow. In my project there is two setting, one is keeping the input history, one is not keeping the input history.
I tried m_Combo.ShowDropDown(false)when not keeping the history, but there is a black line under it and it doesn't look good. Is there a way to solve this problem?

Thanks a lot in advance.

Bin

Re: How to disable the dropdown arrow of a combo box?

Steve S12-Mar-04 5:46

Steve S

12-Mar-04 5:46

One way is to subclass the control, and handle WM_LBUTTONDOWN yourself, to effectively disable it that way, or alternatively, at run-time create an edit control in it's place which is ES_READONLY.

Steve S

Re: How to disable the dropdown arrow of a combo box?

MeterMan12-Mar-04 20:26

MeterMan

12-Mar-04 20:26

If your wanting to disable it do this
have a combo box and give it a control name like m_example
then on your button or whatever your using
lets say your using a button and the button is called History
you put under OnHistory()
m_example.EnableWindow(FALSE); // disabled combobox or whatever linked to
m_example.EnableWindow(TRUE); // enables combobox or whatever linked to

now if you wanna hide it all together
i would do this under the OnHistory()
m_example.ShowWindow(SW_HIDE); // hides the combobox or whatever linked to

if you want the window back then
m_example.ShowWindow(SW_SHOW);// shows the combobox or whatever linked to

GOOD LUCK,
HOPE THIS HELPS.

Win32newb

"Making windows programs worse than they already are"

Re: How to disable the dropdown arrow of a combo box?

bin892215-Mar-04 5:55

bin8922

15-Mar-04 5:55

thanks a lot. But I just want to disable the drop down button and make it work as an edit box. I don't want to disable the whole thing.

Thanks.

Re: How to disable the dropdown arrow of a combo box?

Babu_Abdulsalam13-Dec-09 21:52

Babu_Abdulsalam

13-Dec-09 21:52

what you can do is:
Just iterate the windows of the combo box. Combo box contains the edit box and the button.
For example

char szClassName[256];
CWnd* pWnd=(CWnd *)m_combo.GetWindow(GW_CHILD);
::GetClassName(pWnd->GetSafeHwnd(), szClassName, 256);
while( strcmp( szClassName,_T("Button")) != 0 )
{
pWnd=(CWnd *)m_combo.GetWindow(GW_HWNDNEXT);
}

//Got the button
if( pWnd )
pWnd->ShowWindow( SW_HIDE );

Re: How to disable the dropdown arrow of a combo box?

rgaab17-Mar-14 14:15

rgaab

17-Mar-14 14:15

Thanks alot, very helpful hint!! Thumbs Up | :thumbsup:

WM_COPYDATA failing?

Dave_12-Mar-04 5:20

Dave_

12-Mar-04 5:20

I have seen issues with something that works fine in all Windows OS's except some machines running 2000 or XP. I'm using a WM_COPYDATA to send text between windows. When it fails, messages that should appear do not. It is extremely hard to narrow it down further than that.

Is anyone aware of any issues using this message on the newer OS's?

Re: WM_COPYDATA failing?

David Crow12-Mar-04 5:27

David Crow

12-Mar-04 5:27

Does it fail consistently? Have you used Spy++ on the recipient window to see if it is receiving the message?

Perhaps the author of this article might have some knowledge of it failing.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: WM_COPYDATA failing?

Dave_12-Mar-04 8:49

Dave_

12-Mar-04 8:49

Well, I've looked into it a bit further. It is actually recieving the message but the pointer to the data seems to be off be quite a bit (haven't counted the offset yet). I can see the start of my struct in the dump but it is preceeded by a bunch of "junk". I really don't know why. I have one long and 2 int's followed by a char[256]. The long, int's and string are all in there but not at the correct starting point.

Any ideas?

Re: WM_COPYDATA failing?

David Crow12-Mar-04 9:27

David Crow

12-Mar-04 9:27

Dave_ wrote:
Any ideas?

Having not ever used that message before, I'm afraid not.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: WM_COPYDATA failing?

Dave_12-Mar-04 9:29

Dave_

12-Mar-04 9:29

I noticed someone else mentioned a similar issue in the article you linked to. No answer posted unfortunately.

Re: WM_COPYDATA failing?

David Crow12-Mar-04 9:30

David Crow

12-Mar-04 9:30

It appears that the author has not been good about answering any of them. Bummer.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: WM_COPYDATA failing?

Sebastian S.14-May-04 2:33

Sebastian S.

14-May-04 2:33

Hi,

I saw a thread where wm_copydata failed due to the nvidia tray-icon app.

MfG

Re: WM_COPYDATA failing?

David Crow14-May-04 2:46

David Crow

14-May-04 2:46

Ok, but since Dave_ was the one asking the question, you might want to respond to him. Smile | :)

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

__asm and C++ inheritance

jk6112-Mar-04 4:59

jk61

12-Mar-04 4:59

Help, please!
How to access a member in a base class from within an __asm block?
Suppose, we have:

struct s1
{
int a;
};

struct s2 : s1
{
int b;
};

struct s3
{
s2 c;
};

then:

__asm mov eax, [eax]s3.c.b // just fine

but

__asm mov eax, [eax]s3.c.a // ERROR

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