C / C++ / MFC

Re: Reading a value from another Project.

12-Aug-08 21:42

T.RATHA KRISHNAN wrote:
For pData_i what value should I pass?

The WM_COPYDATA is the simple IPC mechanism used to sent a chunk of bytes from one window to another. Well, in the pData_i just pass some string to identify your button event such as "ApplicEvent_ButtonPressed" or something like that.

T.RATHA KRISHNAN wrote:
For HWND hTargetWindow_i the second application's exe name or what else?

in your case hTargetWindow_i is the handle of the window in your second application. You can use FindWindow() to find the window by using the window title.

T.RATHA KRISHNAN wrote:
More Over I'm not using MFC. I'm creating window using an external tool.

SDK style programming?

T.RATHA KRISHNAN wrote:
Should add the first project to the second project's solution if I use this method?

Not necessary. If you insert both project to same solution, it will be easier to refer. You can avoid switching of windows. Well, you need two Visual Studio instances to debug both at same time.

Regards,
Jijo.

_____________________________________________________

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

KarstenK12-Aug-08 21:37

KarstenK

12-Aug-08 21:37

If you do messaging you bette use a message ID from RegisterMessage.

Greetings from Germany

Opening help file on pressing f1

VCProgrammer12-Aug-08 19:27

VCProgrammer

12-Aug-08 19:27

Hi all,

i have made a dialog based application in vc2005.

i want to open help file when we press f1 button...

How can i do this?

Thanks in advance

Re: Opening help file on pressing f1

Jijo.Raj12-Aug-08 19:56

Is there any size limit to data that can be copied to Clipboard

12-Aug-08 19:56

Basically you've to handle the WM_HELP message. When you press F1 the WM_HELP message will be posted to your window.

Since you are using mfc, handling it in MFC way will be more easier. Add ON_WM_HELPINFO() to message map and add implement OnHelpInfo() in your dialog. For instance,

// Add ON_WM_HELPINFO() to your message map.
BEGIN_MESSAGE_MAP(CYourDialog, CDialog)
   ...
   ON_WM_HELPINFO()
END_MESSAGE_MAP()


// Add this function to your dialog.
BOOL CYourDialog::OnHelpInfo( HELPINFO* HelpInfo)
{
   return TRUE;
}

Regards,
Jijo.

_____________________________________________________

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

DivyaSV12-Aug-08 19:17

DivyaSV

12-Aug-08 19:17

Hi,

Could anyone please tell me the maximum size of data that can be copied to clipboard?
Thanks,
Divya

.exe file size increased

kDevloper12-Aug-08 19:17

12-Aug-08 19:17

I have a project on VC++ 6.0, the exe file generated out of that was 5 MB,But after conversion to VS2005 it's now 16 MB.what may be the reason? Any thing else is required to reduce the file size.

Regards,
KDevloper

Jijo.Raj12-Aug-08 19:36

12-Aug-08 19:36

In the linker settings, disable Incremental Linking. It can slim down your executable drastically.

Try Removing unwanted libraries from project settings and check whether it can make any difference. Check this link about how to do it - http://weseetips.com/2008/03/28/how-to-remove-unwanted-libraries-from-project-settings/[^]

Regards,
Jijo.

_____________________________________________________

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

kDevloper12-Aug-08 19:37

12-Aug-08 19:37

Hey jijo,

I have already followed the way it's there in your blog, But no it's not helping.. any other idea.

Thanks&Regards,
KDevloper

Jijo.Raj12-Aug-08 19:45

12-Aug-08 19:45

"disable Incremental Linking" doesn't make any difference? I hope you've cleaned and rebuild your project. I've tried it in a sample visual studio 2005 project and i can see good result. Please check once again!

Well, the MFC libraries are statically linked? that can increase your exe size.

kDevloper wrote:
I have already followed the way it's there in your blog, But no it's not helping.. any other idea.

Oooh! You already read that one? Roll eyes | :rolleyes:

Regards,
Jijo.

_____________________________________________________

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

kDevloper12-Aug-08 19:58

12-Aug-08 19:58

Yes, am cleaning and rebuilding this 500 bunch of files from last evening.. but i guess the "disable Incremental Linking" and code generation property change helped me to gte out of the problem.. ok thanks.

U r posts in the blog is really useful.

Regards,
KDevloper.

Jijo.Raj12-Aug-08 20:01

12-Aug-08 20:01

kDevloper wrote:
U r posts in the blog is really useful.

Thanks a lot for those kind words. Big Grin | :-D

Regards,
Jijo.

_____________________________________________________

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

Jijo.Raj12-Aug-08 20:00

12-Aug-08 20:00

Well, did you checked - http://www.codeproject.com/KB/tips/reducesixeexe.aspx[^]

It contains a few more improvement points. Have a look at it.

Regards,
Jijo.

_____________________________________________________

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

kDevloper12-Aug-08 20:23

Quick question about structure declarations and WinProc messages

12-Aug-08 20:23

ok.. will check it out.

Thanks &Regards,
KDevloper

Aaron.Morrison12-Aug-08 17:47

Aaron.Morrison

12-Aug-08 17:47

I am new to VC++ programming and have coded for the first time trying to understand Windows messaging. (I am more used to the good old days of Borland's Turbo C++ 3.0)
My question is about structures.. In the snippet below I have defined my structure as such.

In this snippet I have declared the structure in the Window Process DlgProc as static TONE tsTone; which now works for me!! I previously had it declared as just TONE tsTone;.

If I do not declare the structure as static, after populating the members in the IDC_ONOFF: message when the Windows Process is called again, the structure reference in MM_WOM_OPEN: message has rubbish member values and has a different reference address.

My question is - given the struct of TONE tsTone; is declared within the scope of DlgProc why does the structure appear to be volatile and given a new reference address when a different Windows message is processed? If I am using variables that are spread throughout Windows Messages (but still within the scope of the WinProc), should all variables be declared static?

P.S. some reading reference would be very handy if you have it so you don't have to re-invent the wheel.

Aaron.

typedef struct {
	 int itoneEncoding;
	 double dtoneLeadin;
	 double dtoneLength;
	 int iBuffersize;
}TONE, * PTONE;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
    <<SNIP>>
}

BOOL FillBuffer (PBYTE pBuffer, TCHAR * pszToneCode, PTONE tsTone)
{
     int	 iBuffer;
       << SNIP >>
    
        iBuffer = tsTone->iBuffersize;

	// a=49 A=17 - add codition for lower case letters !!
	for(icTone = 0; icTone < 5; icTone++)
	{
        << SNIP >>
		else
			return FALSE;
		
	<< SNIP >>
	return TRUE;
}

BOOL CALLBACK DlgProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     <<SNIP >>

     static TONE tsTone;

     switch (message)
     {
     << SNIP >>

          case IDC_ONOFF:

                    // Set up TONE structure with variables.
		tsTone.itoneEncoding = iEncoding;
		tsTone.dtoneLeadin = GetDlgItemInt(hwnd, IDC_EDIT_LEADIN, NULL ,FALSE);
		tsTone.dtoneLength = GetDlgItemInt(hwnd, IDC_EDIT_TONELENGTH, NULL ,FALSE);
					

                // calcuate buffer size SAMPLE_RATE * tone length in milliseconds
		// multiplied by 5 for complete buffer size of 5 tones.
		tsTone.iBuffersize = (int)(SAMPLE_RATE * (tsTone.dtoneLength/1000)*5);
        
               <<SNIP>>
               
     case MM_WOM_OPEN:
          SetDlgItemText (hwnd, IDC_ONOFF, TEXT ("Turn Off")) ;

               // Send buffer to waveform output device
          GetDlgItemText  (hwnd, IDC_TONECODE, szToneCode, 6) ;
          if(!FillBuffer (pBuffer1, szToneCode, &tsTone))
		<<SNIP>>
                    
     case MM_WOM_DONE:
	<<SNIP>>
          
      case WM_SYSCOMMAND:
          switch (wParam)
          <<SNIP>>
               return TRUE ;
          }
          break ;

	 }
     return FALSE ;
}

Re: Quick question about structure declarations and WinProc messages

Jijo.Raj12-Aug-08 18:52

Re: Quick question about structure declarations and WinProc messages

12-Aug-08 18:52

Aaron.Morrison wrote:
In this snippet I have declared the structure in the Window Process DlgProc as static TONE tsTone; which now works for me!! I previously had it declared as just TONE tsTone;.

While declaring your structure as TONE tsTone; the structure will be allocated on stack. Since stack will be recreated at different locations during each function call, Local variables on stack are not Persistent between function calls. And local variables will be deleted when the function returns.

if you declare the stack variable as static, it will be initialized during the first call to that function and persists between function calls. They won't be deleted when function returns. For more info, read this - http://www.cprogramming.com/tutorial/statickeyword.html[^]

Aaron.Morrison wrote:
should all variables be declared static?

Other possible ways are -
1) You can keep your structure as global.
2) You can create a singleton class to keep the Persistent data and use it (Recommended).

Regards,
Jijo.

_____________________________________________________

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

Aaron.Morrison12-Aug-08 18:55

Aaron.Morrison

12-Aug-08 18:55

Thanks for pointing out the obvious !!!!
I forget to realise that the function returns after every message completes processing.

Aaron

Can we use VS2008 to develop a VisualC++ application that runs without dot net frame work?

CelestialCoder12-Aug-08 17:31

Re: Can we use VS2008 to develop a VisualC++ application that runs without dot net frame work?

12-Aug-08 17:31

Hello

Newcomer here.

If I am developing application in C# in Visual Studio 2008, I have to install dot net framework in the target system before installing my application. OK?

Can I create a application using Visual C++ in visual studio 2008 which will run without dot net framework in the target system?

May be a silly question, Sorry I was not able to get an answer before.

Thanks

With Regards
Roy Thomas

"..this file is known as source file probably because it is a source of frustration and anxiety!" - Chuck Sphar - In book 'C# 2005 for Dummies'.

Randor 12-Aug-08 17:52

Randor

12-Aug-08 17:52

CelestialCoder wrote:
Can I create a application using Visual C++ in visual studio 2008 which will run without dot net framework in the target system?

Yes, of course! Visual Studio is an IDE which supports multiple languages.

Best Wishes.
-David Delaune

Re: Can we use VS2008 to develop a VisualC++ application that runs without dot net frame work?

CelestialCoder12-Aug-08 19:45

Re: Can we use VS2008 to develop a VisualC++ application that runs without dot net frame work?

12-Aug-08 19:45

Hello

Thanks for the reply. But one more clarification.
I understood that VisualStudio supports many languages like C++, VB etc in VS2008.
But my confusion is regarding the target requirement. Suppose I develop a application in VisualC++ using VS2008 (Windows forms application),will it asks for dot net framework while it is deployed in another system?
Thanks for the patience.

With Regards
Roy Thomas

"..this file is known as source file probably because it is a source of frustration and anxiety!" - Chuck Sphar - In book 'C# 2005 for Dummies'.

Rajesh R Subramanian12-Aug-08 19:52

Rajesh R Subramanian

12-Aug-08 19:52

CelestialCoder wrote:
Suppose I develop a application in VisualC++ using VS2008 (Windows forms application),will it asks for dot net framework while it is deployed in another system?

Windows Forms is a part of the .NET framework and has nothing to do with Visual C++. So, if you develop a Windows Forms application, it will require the .NET framework to be installed on the computer where it would be deployed.

Please leave us our small pleasures, they are small, but they are ours! - Mycroft Holmes ^

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

Re: Can we use VS2008 to develop a VisualC++ application that runs without dot net frame work?

CelestialCoder12-Aug-08 22:14

Re: Can we use VS2008 to develop a VisualC++ application that runs without dot net frame work?

12-Aug-08 22:14

Rajesh R Subramanian wrote:
Windows Forms is a part of the .NET framework and has nothing to do with Visual C++.

Then what was the windows applications created in VisualC++ using VisualStudio 6 (Prior to dot net) called?

Thanks for the time

With Regards
Roy Thomas

"..this file is known as source file probably because it is a source of frustration and anxiety!" - Chuck Sphar - In book 'C# 2005 for Dummies'.

Rajesh R Subramanian12-Aug-08 23:11

Rajesh R Subramanian

12-Aug-08 23:11

CelestialCoder wrote:
[Frown] Then what was the windows applications created in VisualC++ using VisualStudio 6 (Prior to dot net) called?

Native application?

But I see where you ask that question from. I need to mention you that if you write a Visual C++ application with the latest version of Visual Studio, that still would be a native application.

I'd tell you again: Windows forms is not a part of C++. It is a part of the .NET framework. You are just confusing .NET with C++. They are two different things.

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

Re: Can we use VS2008 to develop a VisualC++ application that runs without dot net frame work?

CelestialCoder13-Aug-08 0:25

Re: Can we use VS2008 to develop a VisualC++ application that runs without dot net frame work? [modified]

13-Aug-08 0:25

Rajesh R Subramanian wrote:
if you write a Visual C++ application with the latest version of Visual Studio, that still would be a native application.

then How to create a native application (with a GUI like that we get initially in VS6) in VS2008 is my only issue.

Thanks a lot for the time.
I think we are close to solve the issue..

I opened VS2008 - selected VisualC++ as language-

Now to get a GUI I should select Windows forms application.. Wrong.. So go back..
But I cant find a place to start a native application. I know you are not suggesting that way. But how?

Then How to create a simple GUI with a simple text box and button (Like that we see in SAMs 24 Hr books 1st lesson) which can run in WinXP with no dotnet framework? Confused | :confused:

Thanks again

With Regards
Roy Thomas

"..this file is known as source file probably because it is a source of frustration and anxiety!" - Chuck Sphar - In book 'C# 2005 for Dummies'.

Rajesh R Subramanian13-Aug-08 0:31

Rajesh R Subramanian

13-Aug-08 0:31

CelestialCoder wrote:
But I cant find a place to start a native application. I know you are not suggesting that way. But how?

Open VS 2008, select Visual C++ as the language, and then select, for example:

MFC Application - An application that makes use of MFC libraries. This will require the MFC dlls to be present in the client machine. (You can do a little test with a dialog based application). This wouldn't require the .NET framework to run.

There's also win32 console application, MFC DLLs, Win32 project, etc., They all, each, solve a specific purpose.

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

modified on Wednesday, August 13, 2008 6:37 AM

Re: Can we use VS2008 to develop a VisualC++ application that runs without dot net frame work?

CelestialCoder13-Aug-08 1:59