Re: InterApplication Mesage - C / C++ / MFC Discussion Boards

Randor 10-Mar-08 4:53

Randor

10-Mar-08 4:53

I am not the original poster. I know the difference between the custom ranged messages, but I am asking for clarification of WM_USER being obsolete?

-David Delaune

Re: InterApplication Mesage

James R. Twine10-Mar-08 5:12

James R. Twine

10-Mar-08 5:12

Randor wrote:
[...] but I am asking for clarification of WM_USER being obsolete?

Not really obsolete, but not appropriate for inter-application exchange - right from MS documentation:

0 through WM_USER – 1    Messages reserved for use by the system. 
WM_USER through 0x7FFF   Integer messages for use by private window classes. 
WM_APP through 0xBFFF    Messages available for use by applications. 
0xC000 through 0xFFFF    String messages for use by applications. 
Greater than 0xFFFF      Reserved by the system for future use.

MS Sez:
Message numbers in the second range (WM_USER through 0x7FFF) can be defined and used by an application to send messages within a private window class. These values cannot be used to define messages that are meaningful throughout an application, because some predefined window classes already define values in this range. For example, predefined control classes such as BUTTON, EDIT, LISTBOX, and COMBOBOX may use these values. Messages in this range should not be sent to other applications unless the applications have been designed to exchange messages and to attach the same meaning to the message numbers.

Message numbers in the third range (0x8000 through 0xBFFF) are available for application to use as private messages. Message in this range do not conflict with system messages.

   So! While you CAN use WM_USER as a base for custom inter-application messages, it is implied, if not recommended, that you use WM_APP.

   This is from the VC++6.0 docs, BTW - 7+ years ago qualifies as common knowledge in my book.

   Peace!

-=- James
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Re: InterApplication Mesage

Randor 10-Mar-08 6:00

Randor

10-Mar-08 6:00

James R. Twine wrote:
Not really obsolete

Thanks,
Thats all I was asking.

James R. Twine wrote:
So! While you CAN use WM_USER as a base for custom inter-application messages, it is implied, if not recommended, that you use WM_APP.
This is from the VC++6.0 docs, BTW - 7+ years ago qualifies as common knowledge in my book.

Actually it recommends 0xC000 through 0xFFFF for 'string' messages which are RegisterWindowMessage unique 'named' messages. It does not recommend WM_APP for inter-process messages.

http://msdn2.microsoft.com/en-us/library/ms644947(VS.85).aspx[^]

Anyway, you continue to give answers to questions that I have never asked. All I was asking is for clarification of WM_USER being deprecated.

Lets not continue this discussion any further.

Best Wishes,
-David Delaune

Re: InterApplication Mesage

ThatsAlok10-Mar-08 5:25

ThatsAlok

10-Mar-08 5:25

this might help http://msdn2.microsoft.com/en-us/library/ms644931(VS.85).aspx

Re: InterApplication Mesage

Randor 10-Mar-08 6:04

Randor

10-Mar-08 6:04

The referenced page does not say anything about WM_USER being deprecated. Communicating with some of you CP guys seems difficult at times. I thought I asked a simple question, but perhaps its my fault for not wording it more correctly.

Forget I ever posted a response to your message. Lets not continue the discussion further.

Best Wishes,
-David Delaune

Re: InterApplication Mesage

Rajesh R Subramanian10-Mar-08 7:14

Rajesh R Subramanian

10-Mar-08 7:14

Cool down, Dave. You're one nice guy. I think rather his statement wasn't properly worded. He's one cool guy too, but he isn't a native English speaker and probably meant to say what James said. Smile | :)

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: InterApplication Mesage

ThatsAlok10-Mar-08 7:19

ThatsAlok

10-Mar-08 7:19

sorry brother, if you find my comment disturbing.. actually MSDN itself said that obselete the WM_USER message.. programmer must use WM_App for there app. see http://www.google.co.in/url?sa=t&ct=res&cd=2&url=http%3A%2F%2Fwww.codeproject.com%2FKB%2Fdialog%2Fmessagemgmt.aspx&ei=M23VR-LTCYqw6wOd4KjuBA&usg=AFQjCNGOy-JJOUzm0IcFD1QRhl-CIBjUgA&sig2=5dFoUmK6ihWxHsr24k9NZw

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cheers,
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Re: InterApplication Mesage

Stephen Hewitt10-Mar-08 15:21

Stephen Hewitt

10-Mar-08 15:21

ThatsAlok wrote:

WM_USER is now obselete, application should use WM_APP or use registered window message

What gives you this idea? It's far from obsolete. It's intended for "use by private window classes" where as WM_APP is "available for use by applications".

Steve

Re: InterApplication Mesage

ThatsAlok10-Mar-08 16:58

ThatsAlok

10-Mar-08 16:58

Stephen Hewitt wrote:
What gives you this idea? It's far from obsolete. It's intended for "use by private window classes" where as WM_APP is "available for use by applications".

right you say, but the guy who posted the original question is intended to use it for Inter process communication!

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: InterApplication Mesage

Mark Salsbery10-Mar-08 7:18

Mark Salsbery

10-Mar-08 7:18

All this discussion on WM_USER/WM_APP is great, but what about the
reason it works in debug build but not in release build?

What's up with that?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: InterApplication Mesage

ThatsAlok10-Mar-08 9:15

ThatsAlok

10-Mar-08 9:15

Mark Salsbery wrote:
All this discussion on WM_USER/WM_APP is great, but what about the
reason it works in debug build but not in release build?

generally main question lost between secondary question

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Giving title text to dialog box at runtime........

neha.agarwal279-Mar-08 21:58

neha.agarwal27

9-Mar-08 21:58

Hello all,

I have made a dialog based application and i want to provide its title text at runtime i.e (when i click on exe then it should read a text file and should get dialog box title value)......

Can anybody please help me in doing this....

Thanks in advance....

Re: Giving title text to dialog box at runtime........

Cedric Moonen9-Mar-08 22:00

Cedric Moonen

9-Mar-08 22:00

CWnd::SetWindowText[^]

Cédric Moonen
Software developer

Charting control [v1.3 - Updated]

Re: Giving title text to dialog box at runtime........

Maxwell Chen9-Mar-08 22:01

Maxwell Chen

9-Mar-08 22:01

SetWindowText("The_Title_String"); if you are using MFC.

Maxwell Chen

Re: Giving title text to dialog box at runtime........

David Crow10-Mar-08 3:14

David Crow

10-Mar-08 3:14

SetWindowText() also works without MFC.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

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Re: Giving title text to dialog box at runtime........

Maxwell Chen10-Mar-08 4:33

Maxwell Chen

10-Mar-08 4:33

DavidCrow wrote:
SetWindowText() also works without MFC.

I did not write the handle argument hWnd. Big Grin | :-D

Maxwell Chen

Re: Giving title text to dialog box at runtime........

ThatsAlok10-Mar-08 9:19

ThatsAlok

10-Mar-08 9:19

Maxwell Chen wrote:
did not write the handle argument hWnd.

might be it's CWnd::SetWindowText Wink | ;-)

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

How to get the formatted time..?

Raj-Ekoham DwitiyoNasti9-Mar-08 21:46

Raj-Ekoham DwitiyoNasti

9-Mar-08 21:46

Hi,

I have an Application which supports multiple languages. I want to print the time as the footer string of a page( in AM/PM format).
On English OS(WinXP) this is printing fine but when I am using French OS, the AM/PM information is not being displayed in the footer. Please help me in this regard.
Also, I am using the GetTimeFormat() to set the time format. What should I do?

Thanks and Regards,

Purusottam Mishra

Purusottam Mishra
Software Engineer

Re: How to get the formatted time..?

jhwurmbach9-Mar-08 23:08

jhwurmbach

9-Mar-08 23:08

Raj-Ekoham DwitiyoNasti wrote:
I have an Application which supports multiple languages. I want to print the time as the footer string of a page( in AM/PM format).

Isn't that blatant ignorance of user will? A usability horror?

But OK.
Which locale and/or lpFormat are you feeding into GetTimeFormat?

Let's think the unthinkable, let's do the undoable, let's prepare to grapple with the ineffable itself, and see if we may not eff it after all.
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Re: How to get the formatted time..?

David Crow10-Mar-08 3:17

David Crow

10-Mar-08 3:17

Raj-Ekoham DwitiyoNasti wrote:
Also, I am using the GetTimeFormat() to set the time format. What should I do?

You should be looking at the string that GetTimeFormat() is formatting. Forgo the printing and footer stuff until that is right.

Link File Path

john56329-Mar-08 21:26

john5632

9-Mar-08 21:26

Hi Exprts,

I am so curious to get the link file path but I could not. I am creating a shell context menu. As I click on link file(shortcut) Program resolve the name before the InvokeCommand() function. But in QueryContextMenu() I can detect the link file type through flag CMF_VERBSONLY but I could not get the link file path.

How can I do this?

about adding pictures in the form

savitri9-Mar-08 20:43

savitri

9-Mar-08 20:43

hi everyone,
good afternoon to all.i am facing problem in adding the picture in the form. in my form i added one picture box i set the properties like bitmap but in image box i have to set the path.if i am giving path like E:\savitri like this it is giving error like illligal characters so please enter correct path. please tell me how can i add a picture in the form.picture means i want to browse from different dirctories and add to picture box please help me.

THANKU IN ADVANCE,
savitri Confused | :confused:

Re: about adding pictures in the form

Rajkumar R9-Mar-08 21:01

Rajkumar R

9-Mar-08 21:01

Are you using WinForms, then right click on the picture box and select choose Image option. And posting to WF message board will help more.

And from the Déjà vu experience, I think you are using VC++/MFC and assuming you are refering picture Box for picture control, you mentioned you set the type of picture control to bitmap and in the image field you need to set the ID of the bitmap resource. for that add the bitmap to the resource and change the ID if needed, use that ID in the Image option box. The path cannot be used directly.

Re: about adding pictures in the form

Rajesh R Subramanian9-Mar-08 22:13

Rajesh R Subramanian

9-Mar-08 22:13

Rajkumar R wrote:
And from the Déjà vu experience, I think you are using VC++/MFC

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Query regarding LoadImage function Please help me

Rahul Vaishnav9-Mar-08 20:34

Rahul Vaishnav

9-Mar-08 20:34

Hi all,
I am using below code..

CString lpImagePath;
lpImagePath="D:\\Program Files\\TabTab\\TabTab\\Images\\home_32bit.ico";
UINT colormap = LR_DEFAULTSIZE |LR_LOADMAP3DCOLORS| LR_LOADFROMFILE | LR_CREATEDIBSECTION|LR_LOADTRANSPARENT;
HBITMAP hBitmap =(HBITMAP)::LoadImage ((HINSTANCE)::GetModuleHandle(NULL),lpImagePath,IMAGE_BITMAP,0,0,colormap);

I am getting null in hBitmap if I am loading an icon file with Bit Depth=32.
LoadImage is working fine for all .ico file with Bit Depth upto 24 only.
But I dont know why it is not working for icon file with Bit Depth=32.

Please help me..

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