C / C++ / MFC Discussion Boards

Azghar Hussain5-Sep-04 22:57

5-Sep-04 22:57

Hi Everybody,
I have a small problem with MDI application. Actally I want to customize MDI application in such a way that if some one open menu->File->Open we will get file open dialog box. I want to customize this file open dialog box so that it obeys only .BMP extension file. Please note that I don't want to write my CFileDialog object and handle menu. I just want to customize the default file dialog so that it only obeys .BMP file extension.
Thanks in Advance

Salman
Live and Let live

Re: Small problem with MDI, Please help!!!!

YunYan6-Sep-04 1:05

YunYan

6-Sep-04 1:05

Hi,
You can define the CFileDialog object as following.
CFileDialog FileDialog(FALSE, NULL, NULL,OFN_HIDEREADONLY , "Rule Files (*.rule)|*.rule||");

Conversion of CString to LPCWSTR

Sudhakar Pasupunuri5-Sep-04 22:54

Sudhakar Pasupunuri

5-Sep-04 22:54

Hi ..

I want to convert my "CString" to "LPCWSTR" type.. How can I do this???

Plz help me out ..

Thanks
Sudhakar

Re: Conversion of CString to LPCWSTR

Arsalan Malik5-Sep-04 23:03

Arsalan Malik

5-Sep-04 23:03

Use the function mbstowcs. It takes a char pointer, so use GetBuffer function of CString to get char pointer. Alternatively you can use AllocSysString method to BSTR, which can be easily passed as LPCWSTR.

Arsalan Malik

Re: Conversion of CString to LPCWSTR

Archer2826-Sep-04 4:39

Archer282

6-Sep-04 4:39

use the member function GetBuffer()

Link to microsoft documentation of CString::GetBuffer

example:

CString MyString("This is my string");
LPCWSTR MyLPCWSTR = (LPCWSTR) MyString.GetBuffer(MyString.GetLength());

note: the return type of GetBuffer() is LPTSTR

Re: Conversion of CString to LPCWSTR

Sudhakar Pasupunuri6-Sep-04 19:26

Sudhakar Pasupunuri

6-Sep-04 19:26

Thanks for the info..

It was working perfectly..

Thanks
Sudhakar

Re: Conversion of CString to LPCWSTR

David Crow7-Sep-04 3:13

David Crow

7-Sep-04 3:13

Remember that for every call to GetBuffer(), there must also be a call to ReleaseBuffer(). If you are not going to be editing the internal CString buffer, why ask for a writeable copy? Try this instead:

CString MyString("This is my string");
LPCWSTR MyLPCWSTR = (LPCWSTR) ((LPCTSTR) MyString);

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Function to check if “C:\\myFile.txt” exists

anderslundsgard5-Sep-04 22:29

anderslundsgard

5-Sep-04 22:29

I know there is a small function that checks if a file exists but I can’t find it.

_____________________________

...and justice for all

APe

Re: Function to check if “C:\\myFile.txt” exists

BAIJUMAX5-Sep-04 22:42

BAIJUMAX

5-Sep-04 22:42

hi ,

try this out

CFileFind oFileFind;
if ( oFileFind.FindFile("C:\\myFile.txt") == 0 )
MessageBox("File Not Found")

by
baijumax;P

Re: Function to check if “C:\\myFile.txt” exists

anderslundsgard5-Sep-04 23:24

anderslundsgard

5-Sep-04 23:24

You're the hero of the day

_____________________________

...and justice for all

APe

Re: Function to check if “C:\\myFile.txt” exists

BAIJUMAX6-Sep-04 2:43

BAIJUMAX

6-Sep-04 2:43

hi apeman,

thanks 4 u r comment.why don't u wish me,

hero of future computing.

by
baijumax;)

Re: Function to check if “C:\\myFile.txt” exists

Arsalan Malik5-Sep-04 22:54

Arsalan Malik

5-Sep-04 22:54

You can use FindFirstFile and FindNextFile functions in API.

Arsalan Malik

Re: Function to check if “C:\\myFile.txt” exists

jmkhael5-Sep-04 23:17

jmkhael

5-Sep-04 23:17

Check _access and _waccess

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: Function to check if “C:\\myFile.txt” exists

caoquanghanh7-Sep-04 17:37

caoquanghanh

7-Sep-04 17:37

You can use this function : PathFileExists(“C:\\myFile.txt”)

hanhquang

Variable argument list functions

Jon Hulatt5-Sep-04 21:20

Jon Hulatt

5-Sep-04 21:20

Hi All,

I'm trying to make a debug function, which will be fairly multiple use in my app, dependant on Command line arguments.

The functon will always TRACE(), and if optionally specified, will write debug info to STDERR, or to a log file. All in one.

I'd like to be able to implement a variable argument list function to do this.

However, I can't find a way to pass the argument list to another variable argument list function.

I'd like to have something like this:-

void MyDebug(char * psFormat, ...)
{
    va_list al; 
    va_start(al, psFormat);

and then format a string based on the variable arg list, something like this (which does not work).

char szDbgMessage[4096];
sscanf(szDbgMessage,pszFormat, al);

because, after that, I could do whatever I wanted with the string... TRACE0() it, cout it, chuck it out to a file, or even make a cup of tea with it?

I managed to do more or less exactly this with gcc with the Gameboy as a target, but no compiler implementor does this the same. Has anyone ever managed this in VC++.

Thanks

JOn

TRACE0(szDbgMessage);

va_end(ptr);

using System.Beer;

Re: Variable argument list functions

francois brondel5-Sep-04 21:38

francois brondel

5-Sep-04 21:38

Hello,

this code does works :

void _cdecl OutputDebug(LPCSTR Fmt, ...)
{
char buff[MY_SIZE_BUFF] ;
va_list args ; va_start(args,Fmt) ;
wvsprintf(buff,Fmt,args) ;
va_end(args) ;
OutputDebugString(buff) ; // Or anything you want ...
}

there are some string function accepting va_list as argument. They have 'v' in there name : vprintf(), vsprintf(), CString::FormatV()

don't forget the _cdecl on functions with variable arguments list (, ...)

Re: Variable argument list functions

Jon Hulatt6-Sep-04 2:21

Jon Hulatt

6-Sep-04 2:21

Just what I was looking for! Thankyou!

using System.Beer;

Initializing an Array inside a Class?

CreepingFeature5-Sep-04 21:07

CreepingFeature

5-Sep-04 21:07

Hi everyone!

Got a quick, yet stupid question!
Why cant you init anything inside a class unless its static const int?

Actualy the question is how can you initialize an array inside class private:
to be const.

I know that it is possible to declare an array and then use a constructor to init it. But how do I make it const if I was to do it thru the constructor.

Thanks.

Re: Initializing an Array inside a Class?

Arsalan Malik5-Sep-04 21:40

Arsalan Malik

5-Sep-04 21:40

You can declare an array inside private block, e.g.

class A {
private:
static const int array[10];
};

and initialize outside class as:

const A::array[10] = {0};

As far as I know, you cannot initialize an const array using constructor list.

Arsalan Malik

Re: Initializing an Array inside a Class?

Rory Solley5-Sep-04 21:52

Rory Solley

5-Sep-04 21:52

Although the former is valid C++ syntax, I think the VC6 compiler will have issues with it.

Re: Initializing an Array inside a Class?

Arsalan Malik5-Sep-04 23:00

Arsalan Malik

5-Sep-04 23:00

I have successfully compiled this syntax with VC6, and found no issues.

Arsalan Malik

Re: Initializing an Array inside a Class?

CreepingFeature6-Sep-04 21:15

CreepingFeature

6-Sep-04 21:15

Thanks a lot!!! Big Grin | :-D

SizeToRect Trouble

Dan Neilsen5-Sep-04 20:52

Dan Neilsen

5-Sep-04 20:52

I am having trouble using the ReBarCtrl SizeToRect method which is supposed to resize the rebar control and "best fit" all of the rebar bands in it.

<br />
CRect pRect;<br />
pRect.bottom = 50;<br />
int rResult = m_Rebar->GetReBarCtrl().SizeToRect(pRect);<br />

rResult always returns 1 (which supposedly means it is working) but irrespective of what values are contaed in pRect, the rebar ends up being only one row high.

Can anyone shed some light on this please?

Re: SizeToRect Trouble

Bob Stanneveld6-Sep-04 9:38

Bob Stanneveld

6-Sep-04 9:38

Hello,

You should set all the members for the rect structure.

rect.left (x1)
rect.right (x2)
rect.top (y1)
rect.bottom (y2)

This way it should resize to de dimensions you desire

Re: SizeToRect Trouble

Dan Neilsen6-Sep-04 13:50

Dan Neilsen

6-Sep-04 13:50

I tried that as well Bob but still got the same results Frown | :(

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