C / C++ / MFC

2-Feb-06 8:17

Given the numeric value (say, 0x0116) of a message, is there an API that returns the message name (say, WM_INITMENU)?

Maximilien2-Feb-06 8:38

Maximilien

2-Feb-06 8:38

I don't think so, message are #define, so they will be replaced at compilation.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Xiangyang Liu 刘向阳2-Feb-06 8:47

2-Feb-06 8:47

Maximilien wrote:
I don't think so, message are #define, so they will be replaced at compilation.

Ok, thanks. My next question will be, why not? It is not like Microsoft is going to change the values from version to version.

Maximilien2-Feb-06 8:49

Maximilien

2-Feb-06 8:49

Why keep a string in an application if only the numerical ID is important ? imagine if in any application you would keep a string equivalent of each ID ( resources, and messages ) ... the application would grow for nothing.

and it's much more efficient to compare integer values than strings.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Xiangyang Liu 刘向阳2-Feb-06 9:07

2-Feb-06 9:07

I am playing with global/local hooks. Now I intercepted all those messages in my hook procedure, I want to print the messages to a log file (I want readable names instead of numeric values so that I can figure out what I can do with the hooks).

According to what you said, there is no API that can give me the message names except writing a giant "switch" block myself, right?

David Crow2-Feb-06 10:16

David Crow

2-Feb-06 10:16

Xiangyang Liu wrote:
I want to print the messages to a log file (I want readable names instead of numeric values so that I can figure out what I can do with the hooks).

Just create a map within your application. See MFC's CMap class for starters. STL probably has a similar collection. You could try FormatMessage().

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Michael Dunn2-Feb-06 8:51

2-Feb-06 8:51

In the VC watch window, enter "116,wm" and it'll show the text version if it is available.

--Mike--

Maximilien2-Feb-06 8:58

Maximilien

2-Feb-06 8:58

WOW !!!

Maximilien Lincourt
Your Head A Splode - Strong Bad

Xiangyang Liu 刘向阳2-Feb-06 9:15

2-Feb-06 9:15

Thanks. What I am looking for is a way to get the text of a windows message from my code so that I can print readable information into a log file.

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer2-Feb-06 10:46

2-Feb-06 10:46

I'm not aware of any API. A good amount of the messages change meaning
depending on the window class of the recipient. The nearest to a cunning idea I have is to parse windows.h...

Tedious, admittedly.

Iain.

String in Console.Write

JGonzalezGUS2-Feb-06 8:16

JGonzalezGUS

2-Feb-06 8:16

I used VC++6 a few years ago and then was out of programming for a long while. Trying to get back to it again (C++) using VS .Net 2003. Got a book (Step by step) where the author shows:
Console.Write(S"....");
What does the 'S' do? I've seen it with and without it and it seems to work the same either way. Where can I read about? I've tried looking in the .net help but I guess I'm not using the right search.
Thanks,
Jose

Re: String in Console.Write

Michael Dunn2-Feb-06 8:53

text not appending at the end of file

2-Feb-06 8:53

The S prefix on a string literal means "this is a managed Unicode string".

--Mike--

zahid_ash2-Feb-06 7:20

zahid_ash

2-Feb-06 7:20

I get the string in each iteration of loop and i have to append that string at the end of file, but i am not getting the all values , file only shows(have) last written value in it.

I am using the code below:

CString text; //assume text var have different value in each iteration

For ( int i = 0 ; i <=5; i++)
{

CString filename = "f:/ TestFile.pc" ;
CFile files;
files.Open( filename , File::modeCreate|CFile::modeReadWrite|CFile::typeBinary);

files.Seek(0L,CFile::end);
files.Write(text , text.GetLength ());
//
files.Close ();

}

Regards.

Michael Dunn2-Feb-06 7:37

2-Feb-06 7:37

From the docs:

CFile::modeCreate Directs the constructor to create a new file. If the file exists already, it is truncated to 0 length.

--Mike--
Visual C++ MVP Cool | :cool:

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zahid_ash2-Feb-06 7:41

zahid_ash

2-Feb-06 7:41

First it was created by the code ,

Then after that want to append in already existing file.

So what Flags I should use, please tell me for writing 2nd time and so on

Regards.

Michael Dunn2-Feb-06 7:49

2-Feb-06 7:49

RTFM

CFile::modeNoTruncate Combine this value with modeCreate. If the file being created already exists, it is not truncated to 0 length.

--Mike--
Visual C++ MVP Cool | :cool:

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Gary R. Wheeler2-Feb-06 14:39

Gary R. Wheeler

2-Feb-06 14:39

Slight correction, Mike: RTFMSDN.
Big Grin | :-D

Software Zen: delete this;

Fold With Us![^]

Dependencies + VS .Net 2003

Chris Meech2-Feb-06 7:40

Chris Meech

2-Feb-06 7:40

The attribute File::modeCreate will cause the existing file to be truncated to a zero length every time you open it. So when you next Seek it won't do anything. You also need to open it with the attribute of File::NoTruncate.

Chris Meech

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LukeV2-Feb-06 7:06

LukeV

2-Feb-06 7:06

Hi!

I'm trying to install my app on a computer where VS is not installed. For some reason it does not work. I tried to use depends.exe to find out where the problem is but I don't really know what to do with the results:

GetProcAddress(0x77BA0000 [MIDIMAP.DLL], "midMessage") called from "WINMM.DLL" at address 0x76AE3AFE and returned NULL. Error: Procedure cannot be found (127).

Second chance exception 0xE06D7363 (Microsoft C++ Exception) occurred in "KERNEL32.DLL" at address 0x7C81EB33.

Exited "VRSOFT20.EXE" (process 0x584) with code -529697949 (0xE06D7363).

Entrypoint reached. All implicit modules have been loaded.

The dll have the same version on both computers. What's wrong???

Luc Smile | :)

typedef template

Erock1232-Feb-06 6:23

Erock123

2-Feb-06 6:23

How can I rewrite

template < class Class1 > typedef friend class Class2;

so that it is compatible with .NET's compiler?

Any help is very appreciated.

-- modified at 12:28 Thursday 2nd February, 2006

Changing caption of static control at run time

BiswaR2-Feb-06 5:31

BiswaR

2-Feb-06 5:31

Can any one please explain me how to change the the caption of a static control at run time based on some condition.For example during the OnInitDialog function of the dialog on which the control is there.

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer2-Feb-06 6:03

2-Feb-06 6:03

BOOL CMyDialog::OnInitDialog ()
{
    SetDlgItemText (IDC_A_STATIC_TEXT, "New Text. Whoopidoo");


    return CDialog::OnInitDialog ();
}

You have to give the static control an ID in the dialog editor, and ID_STATIC does not uniquely identify the control.

Iain.

BiswaR2-Feb-06 21:31

BiswaR

2-Feb-06 21:31

Hey Guys,
Thanks a lot for you help. Exactly the same i was trying yesterday but that was not working i do not know why. I think ihad some problems.Thanks a lot again.

RChin2-Feb-06 6:05

RChin

2-Feb-06 6:05

Use the SetWindowText function.
So if you have a static control with id IDC_STATIC1. Then you would change the text using:

<br />
GetDlgItem(IDC_STATIC1)->SetWindowText(_T("Ta Da!"));<br />

I Dream of Absolute Zero