C / C++ / MFC Discussion Boards

Re: Edit control with HTML link

sabapathy_809-Jan-09 7:47

sabapathy_80

9-Jan-09 7:47

Thanks.. I'll look in it..

Re: Edit control with HTML link

Code-o-mat8-Jan-09 7:02

Code-o-mat

8-Jan-09 7:02

Take a look at this[^], might be usefull.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: Edit control with HTML link

Hamid_RT8-Jan-09 7:35

Hamid_RT

8-Jan-09 7:35

OR see CRichEditControl50W - A VC++ Rich Text Edit 4.1 MFC Control[^].

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 )

Show color at pointer position...

Richard Perrine8-Jan-09 2:49

Richard Perrine

8-Jan-09 2:49

found florin visalescu's code on the screen color picker: http://www.codeproject.com/KB/GDI/screencolorpicker.aspx?msg=2871007#xx2871007xx

what code do i use to actually "show" the color that the pointer is over?

Thank you!

Re: Show color at pointer position...

toxcct8-Jan-09 2:53

toxcct

8-Jan-09 2:53

you know, there's a forum down the article[^]. why don't you ask there ?

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Re: Show color at pointer position...

Richard Perrine8-Jan-09 6:45

Richard Perrine

8-Jan-09 6:45

I did. I just wanted to increase my chances of a response. Smile | :)

Re: Show color at pointer position...

toxcct8-Jan-09 6:51

toxcct

8-Jan-09 6:51

this is called cross-posting, and generally not well seen.

moreover, you had all the infos you needed, if only you'd read the article entierly... Poke tongue | ;-P

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Re: Show color at pointer position...

Jijo.Raj8-Jan-09 3:17

Jijo.Raj

8-Jan-09 3:17

You have to combine the code snippets provided in article.

HDC hDC;
hDC = CreateDC("DISPLAY",0,0,0);

CPoint point;
GetCursorPos(&point);

COLORREF color;
color = GetPixel(hDC,point.x,point.y);

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Re: Show color at pointer position...

Richard Perrine8-Jan-09 6:46

Richard Perrine

8-Jan-09 6:46

Thanks, Jijo.

Invoking a Web Service using Visual C++ .NET

Thomas_Mathews8-Jan-09 1:40

Thomas_Mathews

8-Jan-09 1:40

I want to Invoking a Web Service using Visual C++ .NET. Please provide me with information.

I have sample code to invoke web service using c#. The web service method has complex data as input. Please reply.

Re: Invoking a Web Service using Visual C++ .NET

Hamid_RT8-Jan-09 1:47

Hamid_RT

8-Jan-09 1:47

Your way is wrong go back to Managed C++/CLI[^].

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 )

How to create, fire and send event in Win32, c++ application

Member 46202168-Jan-09 0:29

Member 4620216

8-Jan-09 0:29

Hello friend,

I am using one Win32 application, which communictate with service manager, service manager then load Win32 dll.
I want to create event hadler.
In loaded Win32 dll whenever I found command from device, dll should fire the event and notufy to the Win32 application.
My win32 application should make one event listener and it should receive the event whenever any event gets fire from Win32 dll.
I saw concept of event listener in C# whre we create one event handler function.Whenever user press key or mouse button it notifies to my C# application about the key.
The same way I want to create the event handler in C++ with Win32 base application
In MFC also we declare ON_BNCLICKED which notifies the event whenever button has been pressd.
Please give me a suggestion to crate the event in Win32.
Waiting for your kind reply.

Thank you.

Re: How to create, fire and send event in Win32, c++ application

Stuart Dootson8-Jan-09 2:11

Stuart Dootson

8-Jan-09 2:11

Win32 events[^] would allow you to signal the application from the DLL - but pass no data.

Other alternatives include named pipes and mailslots - those would allow you to pass data from the DLL in the service manager to your application.

You want to look at interprocess communications[^] and synchronisation[^], I think.

One other alternative - if you can pass a window handle from your application to the DLL in the service manager (probably a bit tricky!), your DLL could post window messages to that window - see the documentation[^] for details.

How to check null or corrupted char pointer value

KASR18-Jan-09 0:11

KASR1

8-Jan-09 0:11

const char *pVar;
we can check (pVar == NULL) for null values.
How to check when the pVar contains bad pointer(not NULL)?

Re: How to check null or corrupted char pointer value

Abhijit A8-Jan-09 0:34

Abhijit A

8-Jan-09 0:34

to check bad ponter for string use

use BOOL IsBadStringPtr(LPCTSTR lpString,WORD uuMaxLen)

for example:
const char *pVar;

if(IsBadStringPtr((LPCTSTR)pVAr,1)==TRUE)
//pVar contains bad pointer or memory is not allocated to pVar
else
//pVar contains memory allocated with it

abhi

Re: How to check null or corrupted char pointer value [modified]

CPallini8-Jan-09 0:38

CPallini

8-Jan-09 0:38

Simply put: you cannot. That's the reason to set pVar=NULL ~~just before~~ immediately after freeing its associated memory.
However it depends on your definition of 'bad pointer' (IMHO a variable wrongly pointing a valid memory area is also 'bad'...).
Smile | :)

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.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

modified on Thursday, January 8, 2009 6:48 AM

Re: How to check null or corrupted char pointer value

KASR18-Jan-09 0:47

KASR1

8-Jan-09 0:47

Actually the pVar is assigned NULL and passed to a DLL.
The DLL assigned pVar to bad pointer.

Re: How to check null or corrupted char pointer value

Cedric Moonen8-Jan-09 0:50

Cedric Moonen

8-Jan-09 0:50

KASR1 wrote:
Actually the pVar is assigned NULL and passed to a DLL.
The DLL assigned pVar to bad pointer.

Can you post the code of what the dll is doing ?

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: How to check null or corrupted char pointer value

KASR18-Jan-09 1:02

KASR1

8-Jan-09 1:02

please see reply to pallini.

Re: How to check null or corrupted char pointer value

KASR18-Jan-09 1:27

KASR1

8-Jan-09 1:27

Prototype:
typedef HRESULT (STDAPICALLTYPE * LPFPTRANSLATE) (char* psz1, char* &psz2);

second parameter i am getting bad pointer.

Re: How to check null or corrupted char pointer value

CPallini8-Jan-09 0:52

CPallini

8-Jan-09 0:52

I fixed my (obviuosly Blush | :O

) wrong reply.
What is pVar expected to be by the DLL (i.e. what is the prototype of the DLL's function)?

Re: How to check null or corrupted char pointer value

KASR18-Jan-09 0:58

KASR1

8-Jan-09 0:58

Its a third party DLL.(we don't have code)

Prototype:
typedef HRESULT (STDAPICALLTYPE * LPFPTRANSLATE) (char* psz1, char* &psz2);

second parameter i am getting bad pointer.

Re: How to check null or corrupted char pointer value

toxcct8-Jan-09 1:06

toxcct

8-Jan-09 1:06

How do you know it is a "bad" pointer ?

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Re: How to check null or corrupted char pointer value

KASR18-Jan-09 1:14

KASR1

8-Jan-09 1:14

Program crashes when accessing value from second parameter passed ie., psz2

Re: How to check null or corrupted char pointer value