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Re: How can reduce memory usage of application?

Eugen Podsypalnikov8-Mar-10 22:40

Eugen Podsypalnikov

8-Mar-10 22:40

The sources will be presented in the output window (to double click)
only if it (see above) is included Smile | :)

Please check other sources Smile | :)

Check your definition of Irrationality[^] Smile | :)

1 - Avicenna
5 - Hubbard
3 - Own definition

How Add dialog and show it?

sepel5-Mar-10 17:36

sepel

5-Mar-10 17:36

Hi Experts.
I'm new in Mfc.
In c# I cloud easily add new form to my application and show it.
At first step in Mfc I need to add some dialog to my application and then from some menu or button command display it.
But I mixed to how do it?
Thanks for your kinds.

sepel

Re: How Add dialog and show it?

A&Ms5-Mar-10 18:30

A&Ms

5-Mar-10 18:30

From 'View' Menu Choose to see Resource 'View Panel' in your IDE
In the Resource View Panel Expand Items and right click the Dialog Branch and Choose 'Add Resource' and press New Button of add Resource Dialog.
After your dialog has created you can see it in Resource Designer when ever you want by Double Clicking on it in Resource View Panel.

After You do all these Right Click on your Dialog in Resource Designed and choose 'Add Class'

fill the class field with a name (e.g. "CTemp1Dlg")and before Finishing the wizard attention the names of .Cpp File and .h file which is created for you through wizard (here : Temp1Dlg.h and Temp1Dlg.cpp)

now include the Temp1Dlg.h File created in previous step in your Code which you want to Modal your Dialog.

in the method you want to Modal your Dialog write the below code:

CTemp1Dlg dlgMyDialog(this);
dlgMyDialog.DoModal();

Re: How Add dialog and show it?

sepel5-Mar-10 20:09

sepel

5-Mar-10 20:09

It works !.
Thanks Amir.
Dear Amir,I have some expert in C# and now I migrate to mfc for some interesting and some works !.
Can I ask you guide me to some books or another resource to help me learn mfc better( and quick)?
Best Regards

sepel

Re: How Add dialog and show it?

A&Ms6-Mar-10 4:07

A&Ms

6-Mar-10 4:07

Ok Please Don't hesitate to ask any question ,But I could not promise if I could answer them all.

Here is a list of update books you may like to use, How ever mostl of MFC guide books found in the net are old ones but they could be useful too because the bases are the same:

http://msdn.microsoft.com/en-us/visualc/dd721903.aspx[^]
By the way for those who are new to MFC, How Do I? Video Series[^] would be interesting.

Re: How Add dialog and show it?

sepel6-Mar-10 20:51

sepel

6-Mar-10 20:51

So Helpful.
Thanks again.

sepel

Protect App

john56325-Mar-10 15:43

john5632

5-Mar-10 15:43

Can I design application like no debugger gets the information from it.

Re: Protect App

Maximilien6-Mar-10 1:19

Maximilien

6-Mar-10 1:19

1- build in RELEASE more
2- don't waste time on that issue because if your application is worthy enough, crackers/hackers will break it.

other than that, can you explain what you want, or what information you do not want people to see ?

Watched code never compiles.

Converting char* to LPCSTR

ArnorBld5-Mar-10 14:00

ArnorBld

5-Mar-10 14:00

I'm working a _little bit_ with Visual C++ (Visual Studio 2005) but it is not a language I'm familiar with! I have a funtion that needs to take a char* parameter (non unicode) but inside that function I need to work with the data passed in as LPCSTR. I have found quite a few options to convert from LPCSTR to char* but not the other way around.

I have:

myfunction (char* param1)
{
LPCSTR p1;
}

How do I get the value of param1 into p1?

Thanks in advance Smile | :)

Best regards,

Arnor Baldvinsson

Re: Converting char* to LPCSTR

Avi Berger5-Mar-10 14:27

Avi Berger

5-Mar-10 14:27

I believe that LPCSTR is just const char *, so there is no conversion necessary. Just try:

LPCSTR p1 = param1;

Now, since p1 is a pointer to const, what it points to can not be changed through it.

Going the other way is an issue because what is being pointed to is presumably const, so you should not point a pointer-to-non-const to it. That would break the do not alter rule. So conversion isn't really the issue, but rather making an alterable copy of the original.

Now, if unicode was involved on one side but not the other, ... but that's not your question. Smile | :)

Please do not read this signature.

Re: Converting char* to LPCSTR

ArnorBld8-Mar-10 7:33

ArnorBld

8-Mar-10 7:33

Thank you Avi for a very quick response. I think I have this under control now Smile | :)

Best regards,

Problem with one of the MFC new feature pack controls CMFCPropertyGridCtrl

A&Ms5-Mar-10 11:10

A&Ms

5-Mar-10 11:10

Hi,
How could I change the CMFCPropertyGridCtrl Property Column or Value column width?
a sample code would be more useful

c++ and using public static members in a class

Alan Kurlansky5-Mar-10 10:30

Alan Kurlansky

5-Mar-10 10:30

How do you do a extern type declaration for this. At link time I get unresolved external symbol "public: static void__cdecl etc. etc.
I'm trying to expand my use of C++ to envelop static functions inside of classes as a way to help organize the code a bit better.

Re: c++ and using public static members in a class

C^hris L^osinger5-Mar-10 10:57

C^hris L^osinger

5-Mar-10 10:57

this worked for me:

class A 
{
public:
    static void g(int)
    {
        int i = 0;
    }
};

typedef void (*fp)(int);

int _tmain(int argc, _TCHAR* argv[])
{
    fp p = A::g;
    p(1);
    return 0;
}

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Re: c++ and using public static members in a class

Alain Rist5-Mar-10 11:08

Alain Rist

5-Mar-10 11:08

// MyClass.h
class MyClass
{
	static INT m_i;
	// ...
};
// if you want to keep it in definition part
__declspec(selectany) INT MyClass::m_i; // default initialized to 0

// MyClass.cpp
// ...
// if you want to have it in implementation part
INT MyClass::m_i; // default initialized to 0
// ...

cheers,
AR

When the wise person points at the moon the fool looks at the finger (Chinese proverb)

Re: c++ and using public static members in a class

Avi Berger5-Mar-10 12:52

Avi Berger

5-Mar-10 12:52

Static member functions usage:

MyClass.h:

class MyClass
{
public:
    static int fcn( int param );
    static int inlineFcn( int param) )    // may be inlined, but not guaranteed
    {
         // just a little stuff
    };
};

MyClass.cpp:

#include "Myclass.h"

int MyClass::fcn( int param )
{
    // stuff
}

Client.cpp:

#include "Myclass.h"

void clientFcn( int a, int b )
{
    // stuff

    int c = MyClass::fcn( a );
    int d = MyClass::inlineFcn( b );

    // more stuff
}

It sounds to me that another approach might be more suitable for your purposes. I'll post that next.

Please do not read this signature.

Re: c++ and public static member functions - alternative approach

Avi Berger5-Mar-10 13:26

Avi Berger

5-Mar-10 13:26

Alan Kurlansky wrote:
a way to help organize the code a bit better

It sounds to me like you want the organization, but what you are doing is not truly about classes and object orientation. There is another facility in C++, namespaces, that may be more appropriate for your current use. It organizes things in groups and helps avoid naming conflicts, but does not raise the "object" expectations of someone reading your code.

In some ways using namespaces looks a lot like what I posted for static member functions.

This is how you might use namespaces:

Group.h:

namespace Group
{
    int fcn( int param );
    inline int inlineFcn( int param) )    // may be inlined, but not guaranteed
    {
         // just a little stuff
    };
}

Group.cpp:

#include "Group.h"

namespace Group
{
    int fcn( int param )
    {
        // stuff
    }
}

Client.cpp:

#include "Group.h"

void clientFcn( int a, int b )
{
    // stuff

    int c = Group::fcn( a );
    int d = Group::inlineFcn( b );

    // more stuff
}

AlternateClient.cpp:

#include "Group.h"

using namespace Group;

void altClientFcn( int a, int b )
{
    // stuff

    int c = fcn( a );
    int d = inlineFcn( b );

    // more stuff
}

Please do not read this signature.

Re: c++ and public static member functions - alternative approach

Alan Kurlansky6-Mar-10 11:34

Alan Kurlansky

6-Mar-10 11:34

Yes, organization is what I'm looking to do in this case. This looks good. I'll give this a try. Thanks

Re: c++ and public static member functions - alternative approach

Avi Berger6-Mar-10 16:43

Avi Berger

6-Mar-10 16:43

Good luck. I hope it works well for you.

I will add a note about style. My example showed indenting a level inside the namespace definitions, just like you would do for any other pair of {}'s. There are style guidelines that recommend not doing so for namespaces. I'm undecided about this myself.

Please do not read this signature.

Re: c++ and public static member functions - alternative approach

Alan Kurlansky6-Mar-10 11:35

Alan Kurlansky

6-Mar-10 11:35

Thanks. This looks good. I'll give it a try.

Bagh! Pointers

Herboren5-Mar-10 9:53

Herboren

5-Mar-10 9:53

I was reading http://www.cplusplus.com/doc/tutorial/pointers/
I understood most of what they were saying, so I chose to write my own code and comment what I have done to remember it in the future, but then its starts getting confusing near "Pointers and arrays" can anyone point out some simpler code for me to understand, so far this is the last thing I created::

// Pointers.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include < conio.h >
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	int fI = 3, sI = 2, tI = 1;
	int * p1, * p2, * p3;

	 p1 = &fI;			//Reference of first Integere held in p1
	 cout << p1 << ": ";
	*p1 = fI;			//*p1 points to the varible reference at location 
	cout << *p1 << endl;
	
	 p2 = &sI;			//Reference of second first Integere held in p2
	 cout << p2 << ": ";
	*p2 = sI;			//*p2 points to the varible reference at location 
	cout << *p2 << endl;

	 p3 = &tI;			//Reference of third Integere held in p3
	 cout << p3 << ": ";
	*p3 = tI;			//*p3 points to the varible reference at location 
	cout << *p3 << endl;

	_getch();
	return 0;
}

Re: Bagh! Pointers

C^hris L^osinger5-Mar-10 10:31

C^hris L^osinger

5-Mar-10 10:31

this tutorial[^] looks pretty good.

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Re: Bagh! Pointers

David Crow5-Mar-10 10:48

David Crow

5-Mar-10 10:48

Herboren wrote:
...can anyone point out some simpler code for me to understand...

See here.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

the "Decimal" data type in vc++

b-rad3115-Mar-10 8:17

b-rad311

5-Mar-10 8:17

Hi,

Does anyone know what settings I have to change in vc++, for it to allow for the use of the "Decimal" data type as opposed to float or double?

Thanks

Re: the "Decimal" data type in vc++

C^hris L^osinger5-Mar-10 8:19

C^hris L^osinger

5-Mar-10 8:19

C++ doesn't have a "Decimal" data type.

there are plenty of decimal classes out there on the net, though. google...[^]

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