Display Message - C / C++ / MFC Discussion Boards

Re: client-server

reyyy29-Jan-07 4:56

reyyy

29-Jan-07 4:56

Maybe someone knows any guide or tutorial to how to create server-client side engine?

why mouse hook processed 2 times?

bengz28-Jan-07 6:22

bengz

28-Jan-07 6:22

HI,

I am using a setwindowsHook() with WM_GETMESSAGE in VC++.NET

The purpose is to detect any left mouse button click.

It does detect. however, it was processed 2 times whenever ONE mouse click was pressed. any reasons?

my code is:
MOUSEDLL_API LRESULT CALLBACK hookproc(int ncode,WPARAM wparam,LPARAM lparam)
{
LPMSG msg = (LPMSG) lparam;
if( (ncode == HC_ACTION) && (wparam==PM_REMOVE) )
{
if( (msg->message == WM_LBUTTONDOWN) && (wparam == PM_REMOVE) )
{
PostMessage(hwnd,leftclick,wparam,lparam);
}
}
}

need help.. tks

terr

Re: why mouse hook processed 2 times?

Mark Salsbery28-Jan-07 7:06

Mark Salsbery

28-Jan-07 7:06

I'm not sure where you are getting info for a mouse hook proc. According to the docs
it should be something like this:

MOUSEDLL_API LRESULT CALLBACK hookproc(int ncode,WPARAM wparam,LPARAM lparam)
{
   MOUSEHOOKSTRUCT *pMouseHookStruct = (MOUSEHOOKSTRUCT *)lparam;
 
   if( wparam == WM_LBUTTONDOWN )
   {
      PostMessage(hwnd,leftclick,wparam,lparam); 
   }
 
   CallNextHookEx(...);
}

Re: why mouse hook processed 2 times?

bengz28-Jan-07 7:22

bengz

28-Jan-07 7:22

hi.

hmm.. i changed to the abv method u gave. but it still captures 2 times instead of only 1 time per click.. any idea?

thanks...

terr

Re: why mouse hook processed 2 times?

Mark Salsbery28-Jan-07 7:27

Mark Salsbery

28-Jan-07 7:27

A breakpoint at...

PostMessage(hwnd,leftclick,wparam,lparam);

...gets hit two times per click?

Re: why mouse hook processed 2 times?

bengz28-Jan-07 7:43

bengz

28-Jan-07 7:43

hi..

the postMessage() did not process 2 times, instead the hookproc() was processed 2 times and therefore, postMessage() was called 2 times seperately.

so.. you have any idea?

ie. when i click once, the hookproc() was processed 2 times instead of 1 time.

rdgs
terr

Re: why mouse hook processed 2 times?

Mark Salsbery28-Jan-07 7:57

Mark Salsbery

28-Jan-07 7:57

The hook proc should get called at least once for the WM_LBUTTONDOWN and once for the
WM_LBUTTONUP. There's also WM_MOUSEMOVE, WM_MOUSEWHEEL, etc. messages, all of which go
through your hook proc.

That's why you need to flter out just the messages you are interested in. You may want/need
to filter by HWND or cursor position - that information is in the MOUSEHOOKSTRUCT structure.

What is the value of "leftclick" in your PostMessage call? If it is WM_LBUTTONDOWN then
your hwnd could receive two WM_LBUTTONDOWN messages if the click was in the same hwnd you
posted to.

*EDIT By the way, if "leftclick" is WM_LBUTTONDOWN then that's bad.  The WM_LBUTTONDOWN posted<br />
to windows has different wparam/lparam parameters than the hook proc wparam/lparam.

Mark

Display Message

jon_fallon28-Jan-07 5:21

jon_fallon

28-Jan-07 5:21

Is there a nifty function similar to AfxMessageBox() that one can call to bring up, and then make another call to close?

A routine wthat rites an XLS file takes a variable amount of time, and all that is needed is a popup of some sort that notifies the user what it is doing.

Thanks.

Re: Display Message

Eytukan28-Jan-07 5:30

Eytukan

28-Jan-07 5:30

Can this be helpful for you?Clickety[^]

Code-Frog:So if this is Pumpkinhead. Time for him to run and hide. It's an interesting thought really.

Re: Display Message

jon_fallon28-Jan-07 5:45

jon_fallon

28-Jan-07 5:45

That is more involved than I was anticipating, and am not sure how long the file will take to write. Bringin up EXCEL can take either a few seconds or longer, and the file writing varies as well. Thanks for the reference.

Re: Display Message

prasad_som28-Jan-07 5:32

prasad_som

28-Jan-07 5:32

Can you explain a bit clear ?
Do you need progress dialog kind of thing ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: Display Message

jon_fallon28-Jan-07 5:42

jon_fallon

28-Jan-07 5:42

No, just a pop up at the start of the file writing routing saying 'Writing the XLS file', and then have it closed by the program after the file is written. Thanks.

Re: Display Message

Mark Salsbery28-Jan-07 7:12

Mark Salsbery

28-Jan-07 7:12

You could use a modeless dialog window.
Create/show it before the operation, destroy it after the operation completes. Same thing
as many (most?) progress window implementations, just simpler.

Mark

Re: Display Message

Anilkumar K V28-Jan-07 21:57

Anilkumar K V

28-Jan-07 21:57

Use a timer & end dialog

WM_INIT or something like that....? [modified]

Makakuin28-Jan-07 5:07

Makakuin

28-Jan-07 5:07

Sorry for stupid qestion..
In MFC dialog based applications I used WM_INITDIALOG message handler to do various stuff (setting CListCtrl columns etc.).
Now I`ve created an SDI MFC application with CFormView as base class. The closest message handler I can find here is WM_CREATE, which doesn`t suite my needs (it gets called to early - m_listctrl.InsertColumn() fails because there is no m_listctrl at this time).
Please help!

Which message handler do I use here?

-- modified at 11:15 Sunday 28th January, 2007

Re: WM_INIT or something like that....?

prasad_som28-Jan-07 5:18

prasad_som

28-Jan-07 5:18

Makakuin wrote:
Which message handler do I use here?

See OnInitialUpdate.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: WM_INIT or something like that....?

Makakuin28-Jan-07 5:22

Makakuin

28-Jan-07 5:22

I`ll check it out! Thanks!

Re: WM_INIT or something like that....?

Waldermort28-Jan-07 6:32

Waldermort

28-Jan-07 6:32

prasad_som wrote:
See OnInitialUpdate.

That must an MFC thing.

To the op:
WM_CREATE and WM_CREATEDIALOG are sent during the call to CreateWindow() and CreateDialog(). The window is not created until after these messages have been processed. So it's not the best of places to initialize window dependent data.

One method I often use, from the WM_CREATE handler, call PostMessage() with your own WM_APP + XXX message. This is guarenteed to be the first message you get making it perfect for setting any data.

Re: WM_INIT or something like that....?

prasad_som28-Jan-07 18:44

prasad_som

28-Jan-07 18:44

WalderMort wrote:
That must an MFC thing.

Yes, it is.
OP is using MFC SDI application.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Porting Visual Studio 6 Application

Blamor28-Jan-07 3:54

Blamor

28-Jan-07 3:54

I would like to port one of my Visual Studio 6 application to Visual Studio Express 2005. I would like to be able to use Viusal Studio Express 2005 because I can't shell the money that is required to purchase the full edition of Visual Studio since the projects I am working on are mostly personal projects.

I have looked at Visual Studio Express 2005 and I discovered that it does not support MFC. My application Is fairly small in size and complexity. One dialog box with a menu. The main function is to send and receive data on the serial port when the user clicks on a button. I have started looking around for how I can port my app and I figured maybe using something like wxWidgets would make sense for the GUI part of the app. Now, I don't know what I should use for the serial communications aspects of my app. I need to be able to send data asynchronously. The other aspects is the use of some base functions for data manipulation. For instance, I am using CMap to store data in memory. My understanding is that these functions are not availalble anymore in Visual Studio Express. What can I use to replace these functions? STL? Is there an open source version of it that would work with Visual Studio Express?

Can someone give me pointers?

I do not want to use Managed code, because I want my app to run outside of .NET. I want my app to be a small executable that doesn't require proprietary .DLLs so that I can package all in one installer and doesn't any addtional download or install.

Martin

Re: Porting Visual Studio 6 Application

Cedric Moonen28-Jan-07 5:04

Cedric Moonen

28-Jan-07 5:04

Blamor wrote:
I have started looking around for how I can port my app and I figured maybe using something like wxWidgets would make sense for the GUI part of the app.

That makes sense. Once you've worked with MFC, it will be very easy to use wxWidget, their usage is quite similar.

Blamor wrote:
Now, I don't know what I should use for the serial communications aspects of my app.

Well, what did you use in your VC6 application ? I don't remember that it exist MFC classes for serial communication. You could simply use the plain API functions (like CreateFile, ReadFile, ...). anyway, you can find a lot of existing classes for serial communication on codeproject.

Blamor wrote:
For instance, I am using CMap to store data in memory. My understanding is that these functions are not availalble anymore in Visual Studio Express. What can I use to replace these functions? STL? Is there an open source version of it that would work with Visual Studio Express?

Well, first, these are not functions but classes. And yes, you can use the STL which is distribute with the express edition (wow, I cannot imagine that somebody can distribute a compiler without STL libraries, even for free Poke tongue | ;-P

)
There is also a map in the STL.

Cédric Moonen
Software developer

Charting control [v1.1]

Button to next form/popup

Twalgering28-Jan-07 0:25

Twalgering

28-Jan-07 0:25

I want have make a window form aplecatie for my clan.
and i have made a button withe the name servers
and i want that as i click on the button servers that i
got all ther server ip's with the server statics.
in a new form or a pop up form

but i dont know how to do that.

i hope this is enough information.

Re: Button to next form/popup

Twalgering29-Jan-07 5:52

Twalgering

29-Jan-07 5:52

I use "Visual C++ 2005 Express edition"

Send Sound to SoundCard

A_Fa27-Jan-07 18:44

A_Fa

27-Jan-07 18:44

Hi all friends.
How is it possible to generate sound alarm via Sound Card without using any multi media file ?
similar to Beep(,) that we determine sound frequence .

thanks .

Re: Send Sound to SoundCard

#realJSOP28-Jan-07 0:42

#realJSOP

28-Jan-07 0:42

Why can't you use Beep()? It does precisely what you said you wanted.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
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