Re: A2W - C / C++ / MFC Discussion Boards

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Re: What function is equavalent to CString::AllocSysString() ?

Le centriste6-Jun-02 6:48

Le centriste

6-Jun-02 6:48

SysAllocString (and SysFreeString to free resources)

Michel

It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.

- TreeBeard

Mail Program

Atlence6-Jun-02 6:20

Atlence

6-Jun-02 6:20

Hi!

Is there a way to know if a mail program is present on a system and correctly installed. Because when I use the Windows MAPI functions, my program fails if there is no program set.

I'm programming in C-Windows.

Thks in advance!
Appstmd

Re: Mail Program

Ed Gadziemski6-Jun-02 14:35

Ed Gadziemski

6-Jun-02 14:35

You can check the following registry key to see if any profiles exist:

Win9X/ME:
Software\Microsoft\Windows Messaging Subsystem\Profiles

WinNT:
Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles

Word Application

6-Jun-02 6:23

How can I write text and draw lines in a MS Word Application from an MFC Project without DOC/VIEW Architecture???

Re: Word Application

moredip6-Jun-02 7:27

moredip

6-Jun-02 7:27

You might want to look at COM Automation. It's a lot of work to get your head round at first, but it'll do what you need.

A starting point would be in MSDN, under:
Platform SDK-->COM and ActiveX Object Servies-->Automation

HTH,

Pete

A2W

6-Jun-02 6:11

Are there any specific precautions to using A2W? I am using it in a small piece of code that I have written and I have noticed that at times it appears that I have memory problems.

Any specific things that I need to watch for?

Re: A2W

6-Jun-02 6:16

Acutally sorry I had forgotten to use SysAllocString!

thanks

Re: A2W

Le centriste6-Jun-02 6:51

Le centriste

6-Jun-02 6:51

A2W allocates memory on the stack, so it may be a problem if you convert very large strings.

SysAllocString allocates memory for BSTR string, not w strings, although the code sees them as equivalent. The difference is that a BSTR has 4 bytes preceding the address of the string that tells the length (in bytes) of the string.

Michel

It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.

- TreeBeard

Re: A2W

Anders Molin6-Jun-02 8:55

Anders Molin

6-Jun-02 8:55

As michel wrote, it allocates memory on the stack. But, if you use VC++ 7.0, you can use CA2W(), it allocates memory on the heap, if needed, but otherwise it works just like A2W(). Smile | :)

- Anders

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

Create an exe script in C++

youssef6-Jun-02 5:56

youssef

6-Jun-02 5:56

Hi,

I would like to create a script in C++ for introduce some datas into a executale.

For example : senddata /p test /r test1.

I create a little sample and after I execute my script, the prompt message is closed and I can't see the result.

My sample:

int main(int argc, char* argv[])
{
printf("Hello World!\n");

char *p;
int i;
int iErr;

for (i=1; i

Re: Create an exe script in C++

Rage6-Jun-02 6:00

Rage

6-Jun-02 6:00

This works fine (I just add the condition in the for loop)

int main(int argc, char* argv[])
{
	printf("Hello World!\n");
	
	char *p;
	int i;
	int iErr;
	
	
	for (i=1; i < argc;i++)
	{
		p=argv[i];
		if(*p=='/')
		{
			p++;
			switch(*p)
			{
			case 't':
				{
					printf("Option :t is introduce\n");
					iErr = 1;
				}
				break;
				
			case 'T':
				{
					printf("Option :T is introduce\n");
					iErr = 2;
				}
				break;
			default : 
				printf("Nothing\n");
				iErr = 0;
			}
		}
		else
		{
			printf("Nothing\n");
			iErr = 0;
		}
	}
	
	return iErr;
}

~RaGE();

Re: Create an exe script in C++

youssef6-Jun-02 6:11

youssef

6-Jun-02 6:11

Yes, I know but I would like that the Prompt message is allways displayed and not destroyed.

Have you a solution for me ?

Best Regards

youssef

Re: Create an exe script in C++

Rage6-Jun-02 6:15

Rage

6-Jun-02 6:15

You can force a prompt at the end with

getchar();

...
(BTW, the message is not destroy on my machine until you hit a key (even without the getchar())
How do you run your program ? In VC++ ? Or from the Explorer ? Or from Command Line ?

~RaGE();

How do i use a CString in a non-MFC app?

redeemer6-Jun-02 5:51

redeemer

6-Jun-02 5:51

What do i include? WHen i try to declare a CString it says undeclared identifier.

Thanks.

Re: How do i use a CString in a non-MFC app?

Rage6-Jun-02 5:51

Rage

6-Jun-02 5:51

#include <afx.h>

~RaGE();

I think the file to include got lost due to HTML formatting...

redeemer6-Jun-02 6:13

redeemer

6-Jun-02 6:13

Re: How do i use a CString in a non-MFC app?

John M. Drescher6-Jun-02 6:08

John M. Drescher

6-Jun-02 6:08

Unless you are using WTL you can't, because the MFC version of CString requires some MFC Internals. There is a WTL version but this requires you to use ATL and WTL.

John

Re: How do i use a CString in a non-MFC app?

Ramon Casellas6-Jun-02 6:20

Ramon Casellas

6-Jun-02 6:20

VC NET

Use ATL::CString
#include <atlstr.h>

In VC 6, you can use WTL::CString if you download WTL, but the class in WTL 3.1 was not incredibly good.

Regards,
R.

Re: How do i use a CString in a non-MFC app?

Rage6-Jun-02 6:21

Rage

6-Jun-02 6:21

Sorry, seems that the rest of my post got lost Frown | :(

... OK, Ramon gave you the right thing ...

~RaGE();

Re: How do i use a CString in a non-MFC app?

6-Jun-02 7:17

Why not use stl string. its much better than the CString and feature rich. Easy o use. If u r unsure why not peek into "Thinking in C++" by Bruce Eckel Vol 2. @ mindview.net Blush | :O

update controls based on other inputs

jimNLX6-Jun-02 5:33

jimNLX

6-Jun-02 5:33

I have a popup keypad for numbers and would like to have the number added to a edit control for display as it is typed and then return the number on clicking ok.

I can't seem to get the number to show in the edit control.

I thought there was an article on this but couldn't find it.

Any help would be very much appriciated.

Thanks,

Re: update controls based on other inputs

Rage6-Jun-02 6:16

Rage

6-Jun-02 6:16

Source sample, please ?

~RaGE();

Re: update controls based on other inputs

jimNLX6-Jun-02 7:54

jimNLX

6-Jun-02 7:54

Not sure that I can give enough source to make sence. So I'll try and explain with a short example:

Dialog app. user clicks edit box and a dialog appears with a button and an edit box. The user clicks the button and every time a one is added to a temp array and the new number is displayed in the edit box. On exit the number is returned to the first click edit box.

Number should look like 11111. But in the real app there are 10 buttons plus other functions to act on the number present. Much like a calculator.

Thanks for trying to understand. Hope this helps.

Re: update controls based on other inputs

Rage6-Jun-02 8:21

Rage

6-Jun-02 8:21

OK: It does not sound very complicated...

First, draw your dialog and create a class associated to it, let´s name it CKeypadDlg. If you are already lost, mail back Big Grin | :-D

Add a member

int * m_Response

Then overload the DoModal function like this :

int CKeypadDlg::DoModal(int *response)
{
m_Response=response;
return CDialog::DoModal()
}

declare a CString in your KeypadDLg:

CString m_Result

On your second dialog box, you should have a control associated to your CEditBox (let´s name it m_EditCtrl).

When the user clicks on button 1 for instance you will have to catch it in a OnButton... function - Double Click on the Button in the Dialog, and you´ll get :

void CKeypadDlg::OnButton1()
{
   m_Result+="1";
   m_EditCtrl.SetWindowText((LPCTSTR)(LPTSTR)(m_Result))
}

Same code for all button ...

To get the current result at any moment

int Result_i=_atoi(m_Result);

Finally, override OnOk() with

void CKeypadDlg::OnOK() 
{
	*m_Response=_atoi(m_Result);
	CDialog::OnOK();
}

Oufff ...

use it ike this :

CKeypadDlg myDlg
int final_result=0;
myDlg.DoModal(final_result);
//And here you get the result once the dialog is closed ...

Hope this helps ...

~RaGE();

How do i use IShellFolder::ParseDisplayName correctly?

redeemer6-Jun-02 5:25

redeemer

6-Jun-02 5:25

Not sure how to use it, it always returns "The parameter is incorrect." when the return value is interpreted with the Error Lookup.

Thanks!

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