C / C++ / MFC

Joaquín M López Muñoz13-Feb-03 7:42

13-Feb-03 7:42

(I guess both functions are named myFunct and you've changed the names in your post for explanatory purposes.)

The overload case you describe seems to be OK. Maybe if you post the code where you are invoking the function the problem will be easier to locate.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

JoeSox13-Feb-03 8:06

JoeSox

13-Feb-03 8:06

//Simple Text in, with Message_Box Types(eg. MB_OK)<br />
//<br />
void CPBox::PBox(CString str_in1, UINT nType)<br />
{<br />
	AfxMessageBox(str_in1, nType);//looks like not turning into a YesNO<br />
}<br />
<br />
//Takes int var with no params<br />
//<br />
void CPBox::PBox(CString str_in1, int i_in1)//yesno going here<br />
{<br />
	CString temp, str_i_in1;<br />
	str_i_in1.Format("%d", i_in1);//convert int to cstring<br />
	temp = str_in1;<br />
	temp.Replace("%d", str_i_in1);<br />
<br />
	AfxMessageBox(temp);<br />
}

tRYING to do:

//Simple Text in, with Message_Box Types(eg. MB_YESNO)<br />
	pb.PBox("Simple Text in, with Message_Box Types(eg. MB_YESNO)", MB_YESNO);

Which will not display the Yes/No messagebox because it is being taken being the function that takes the int

Later,
JoeSox
www.joeswammi.com

Load my Sig here.....

Joaquín M López Muñoz13-Feb-03 8:10

13-Feb-03 8:10

OK. MB_YESNO is a macro with no type of its own: without further info, it'll be taken as an int, hence your problem. Explicitly cast the macro to an UINT:

pb.PBox("Simple Text in, with Message_Box Types(eg. MB_YESNO)", (UINT)MB_YESNO);

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

JoeSox13-Feb-03 8:23

JoeSox

13-Feb-03 8:23

Can I examine it in the actual function something like

void CPBox::PBox(CString str_in1, int i_in1)//yesno going here<br />
{<br />
		CString temp, str_i_in1;<br />
	if ((i_in1 != (UINT)MB_YESNO) || ...)<br />
	{<br />
<br />
	str_i_in1.Format("%d", i_in1);//convert int to cstring<br />
	temp = str_in1;<br />
	temp.Replace("%d", str_i_in1);<br />
	}<br />
	else<br />
	{<br />
		AfxMessageBox(str_in1, (UINT)i_in1);<br />
	}<br />
<br />
	AfxMessageBox(temp);<br />
}

I want the parameter calls to the function as close as AfxMessageBox as possible.
Thanks for your help

Later,
JoeSox
www.joeswammi.com

Load my Sig here.....

can't display network computer

valikac13-Feb-03 8:19

valikac

13-Feb-03 8:19

One solution is static_cast. What data type is MB_YESNO? Is that a Windows enum or an abstract enum you implemented? In the latter case, using the enum data type inplace of UINT.

Kuphryn

IGeorgeI13-Feb-03 7:27

IGeorgeI

13-Feb-03 7:27

Hi all

I am trying to make my app a little friendlier.

I a use a dialog to set a network computer as a source for a running object.

For now the user must type in the name of the network coputer manually, for example..... \\server1

I am trying to set up a GUI like the browse folder dialog common in windows. Except it will browse computers on the network. When the user selects the computer, it's name will appears in the dialog box in one of the fields.

I can't find any info on doing this but I have seen this done many times.

Any help appreciated

Confused | :confused:

George W

Software Developer
www.zsystems.ca

Re: can't display network computer

Anders Molin13-Feb-03 14:46

Anders Molin

13-Feb-03 14:46

If you are working on NT/Win2k/XP you can use the Net* functions to find computers and users on the network Smile | :)

Like NetServerEnum()

- Anders

Money talks, but all mine ever says is "Goodbye!"

How can i use CString and CFileFind in a non MFC app

Larsson13-Feb-03 6:43

Larsson

13-Feb-03 6:43

I have a app that is non MFC app and will use CString and CFileFind but if i #include "stdafx.h" i get a error message that say's

fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h> and if i remore al the #include <windows.h> files in the *.h file I still get Many errors what should I do??

\Larsson

Re: How can i use CString and CFileFind in a non MFC app

Joaquín M López Muñoz13-Feb-03 6:53

Re: How can i use CString and CFileFind in a non MFC app

13-Feb-03 6:53

As for CString, Joe O'Leary provides a clone for non-MFC apps in his article CString-clone Using Standard C++[^].

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

PJ Arends13-Feb-03 7:10

PJ Arends

13-Feb-03 7:10

CString and CFileFind are MFC classes, so they can not be used in non MFC apps. You can use std::string or TCHAR* arrays for strings. Use the FindFirstFile[Ex]() and FindNextFile() API functions instead of CFileFind (CFileFind is just a wrapper for these functions).

HTH

CPUA 0x5041

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: How can i use CString and CFileFind in a non MFC app

MAAK13-Feb-03 13:36

MAAK

13-Feb-03 13:36

There is not way for CFileFind to be used in API applications as far as I know (though it's very easy to be done using the API functions),
however if you are using VC++.Net you can use the CString class by inlcuding <atlstr.h<> and use it normally.
I think this might not work in VC++ 6.0

Re: How can i use CString and CFileFind in a non MFC app

Anonymous13-Feb-03 16:59

Anonymous

13-Feb-03 16:59

Just comment out that #error. Everyone does it Smile | :)

Don't forget that the MFC functions are just C++ wrappers for a C core. FindFirstFile, FindNextFile work the exact same way. And CString is just the stanard C functions wrapped, with a bit of magic glue.

Making use of the preprocessor?

moliate13-Feb-03 6:07

moliate

13-Feb-03 6:07

One of my classes keeps a lookup-table that is based on a few constants #define Big Grin | :-D

in the header. If one of the constants change before a recompile the table has to be recomputed, but otherwise it is defined as a constant:

m_table[256] = {
0x00000000, 0x6750096, 0xEEEE4455, 0x45DF5C75, 0xB6662D3D, 0x23EE4521,
...
};

I have a function that computes the table and prints it to standard output, so if I change one of the #define Big Grin | :-D

constants I can compile, run the function, cut-and-paste the table back to my sourcefile, and finally recompile..

Is there any way to make the preprocessor do this? The table-generating function is not simple enough to make into a macro..

Any suggestions?

Thanks
/moliate

The corners of my eyes catch hasty, bloodless motion -
a mouse?
Well, certainly a peripheral of some kind.

Neil Gaiman - Cold Colours

C^hris L^osinger13-Feb-03 6:31

C^hris L^osinger

13-Feb-03 6:31

nope, the preprocessor isn't that capable.

but, take a look here: http://www.codeproject.com/string/CXR.asp

i wrote a little system to do string encryption as part of the build process (roughly similar to your table generation). what i do is add a file to the project that causes VC to do a pre-build step. that pre-build step generates a source file (by calling off to a separate EXE), which is then compiled into the app.

-c

Be very, very careful what you put into that head, because you will never, ever get it out. --Thomas Cardinal Wolsey

Fractals

moliate13-Feb-03 7:07

moliate

13-Feb-03 7:07

Seems like a reasonable solution.

Joaquín M López Muñoz also had an interesting suggestion. I'll first take a shot at template metaprogramming (I like to try out concepts new to me), but if that
fails I'll go with a pre-build step.

Thanks
/moliate

The corners of my eyes catch hasty, bloodless motion -
a mouse?
Well, certainly a peripheral of some kind.

Neil Gaiman - Cold Colours

Joaquín M López Muñoz13-Feb-03 6:33

13-Feb-03 6:33

If the function is not very complex, you can convert it to a constant-time template by using a technique called template metaprogramming. If you post the code maybe I can help you with it.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

moliate13-Feb-03 7:00

moliate

13-Feb-03 7:00

Thanks!

Googled for the term and found some nice pages. I'll try to do the conversion myself first - it will be a nice introduction to the concept. But I hope you don't
mind if I ask you for help if I get stuck...

/moliate

The corners of my eyes catch hasty, bloodless motion -
a mouse?
Well, certainly a peripheral of some kind.

Neil Gaiman - Cold Colours

Joaquín M López Muñoz13-Feb-03 7:05