C / C++ / MFC Discussion Boards

Re: Clashes of numbers in Resource.h files

Jaime Stuardo2-Aug-04 4:46

Jaime Stuardo

2-Aug-04 4:46

When I have a lot of projects, I start redifining range of IDS at the bottom of the H file. All goes OK.

Jaime

Re: Clashes of numbers in Resource.h files

PrashantJ2-Aug-04 18:31

PrashantJ

2-Aug-04 18:31

Jaime,

The problem arises when the numerical value used by the IDS/any control is the same as some other control in another project.
At run time, the wrong string/control would be used. So for this we have to have unique ID's across all projects correct? So I am doing the cleanup, please help me out on some tools/documents available on net if any..

Thanks,
Prashant

Re: Clashes of numbers in Resource.h files

Jaime Stuardo3-Aug-04 1:27

Jaime Stuardo

3-Aug-04 1:27

I told you that I start redifining all range ID's. That way, all ID's become unique for all projects so I never have problems with that.

Since I know about that problem, I modify the ranges when I create the projects. Sorry, but I don't know any tool that does it automatically when the projects are already created.

If the application didn't launch after your modification, you only have to debug it. That's the solution to find what ID was the problem.

Jaime

Help with Compiling Error

arunforce1-Aug-04 18:43

arunforce

1-Aug-04 18:43

Ok this is my source:
-----------------------------------------------------
void CTycoonDlg::OnList()
{
//Displays changes...
extern CListBox* OnList;

// Set the first visible item in the list box to be the middle item
OnList->SetTopIndex(OnList->GetCount()/2);
}
-----------------------------------------------------
I put the code inbetween it just there, and now I can't compile it...

OnList is a list box, and when I try to compile it I get this error...

--------------------Configuration: Tycoon - Win32 Debug--------------------
Compiling...
TycoonDlg.cpp
Linking...
TycoonDlg.obj : error LNK2001: unresolved external symbol "class CListBox * OnList" (?OnList@@3PAVCListBox@@A)
Debug/Tycoon.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

Tycoon.exe - 2 error(s), 0 warning(s)

Any Ideas?

I'm not that good at debugging errors.
Anyways, please keep it simple, I don't really understand much to MFC, im new to it.

I know a bit to C++.

Re: Help with Compiling Error

Michael Dunn1-Aug-04 19:23

Michael Dunn

1-Aug-04 19:23

extern CListBox* OnList tells the compiler "there's a variable called OnList with type CListBox* that is declared in some other source file". Have you declared OnList in some other file? If not, it should probably be a local variable and you need to initialize the pointer before using it.

--Mike--
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SQL Commands

Zero_One_ADO1-Aug-04 17:43

Zero_One_ADO

1-Aug-04 17:43

Hello,
I am using of
CDaoDatabase CDaoRecordset Classes and I want to know that How can I use SQL Commands by them?
Like this(I want to have filter)
"select * from Name where name='something'"

and How can I Set a Field to an Edit Object?
Best Wishes,
Thanks.

Re: SQL Commands

Anonymous1-Aug-04 19:52

Anonymous

1-Aug-04 19:52

the follwing piece of code might help you...

CDaodatabase database;
database.Create("C:\sample_log.mdb");
CString SqlCmd = "CREATE TABLE list (NAME VARCHAR(20), AGE INT, DATE VARCHAR(20), TIME VARCHAR(20));";
database.Execute(SqlCmd);
database.Close();

now to search....
build a query string and execute it...
CString query = "Select * from list where NAME='ABCD'"
CDaoDatabase db;
db.Open("C:\sample_log.mdb");
CDaoRecordSet record(&db);
record.Open(AFX_DAO_USE_DEFAULT_TYPE,query,0);

Then...

while(!recor.IsEOF())
{
.....
use GetFieldValue() for each record in the recordset
}

record.Close();
db.Close();

files and folders

Tyrus1821-Aug-04 17:02

Tyrus182

1-Aug-04 17:02

hi i want to be able to create folders programaticly
also i want to be able to delete files programiticly
i also need to be able to access a folder and loop through each file in the folder
can someone give me some tips or show me where to look

Thanks

Re: files and folders

Ravi Bhavnani1-Aug-04 17:37

Ravi Bhavnani

1-Aug-04 17:37

See CreateDirectory()[^], DeleteFile()[^] and CFileFind[^].

/ravi

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oy !

bikram singh1-Aug-04 18:11

bikram singh

1-Aug-04 18:11

how did you get the text and underline to be differnt colors !

Bikram Singh

Re: oy !

Ravi Bhavnani2-Aug-04 2:26

Ravi Bhavnani

2-Aug-04 2:26

Used <code> and <u>.

/ravi

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Re: oy !

bikram singh2-Aug-04 3:28

bikram singh

2-Aug-04 3:28

It works ! WTF | :WTF:

Bikram Singh

Need Help!! GetDC failed when OffScreenSurface's YUV pixel format in directdraw?

baboguru1-Aug-04 15:41

baboguru

1-Aug-04 15:41

thanks for your time in advance

i programming small video application
i use directdraw to render video frames directly

first i set Surface pixel format to RGB format,
GetDC(&_hdc) worked fine, so i could overlay some text on the screen
but when i changed Surface's RGB pixel format to YUV, problem came out..
video rendering works fine, but GetDC(&_hdc) function failed...

Returned error code is just 0x88760249 (Can't Create DC).
it answers me nothing except it's just failed. Confused | :confused:

<br />
..<br />
HRESULT res = _surface->GetDC (&_hdc); // it failed<br />
..<br />

what might be the cause of this error?? Confused | :confused:

here's some code snippet,,setting pixel format

<br />
...<br />
// set pixel format<br />
_srfDesc.dwFlags |= (DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT);<br />
_srfDesc.dwWidth = width;<br />
_srfDesc.dwHeight = height;	<br />
_srfDesc.ddpfPixelFormat.dwSize = sizeof(DDPIXELFORMAT);<br />
_srfDesc.ddpfPixelFormat.dwFlags = DDPF_FOURCC;<br />
_srfDesc.ddpfPixelFormat.dwFourCC = MAKEFOURCC('Y', 'V', '1','2');<br />
..<br />

thanks again and
prompt reply would be appreciated! Smile | :)

Re: Need Help!! GetDC failed when OffScreenSurface's YUV pixel format in directdraw?

Ryan Binns1-Aug-04 18:31

Ryan Binns

1-Aug-04 18:31

baboguru wrote:
what might be the cause of this error??

Simple. GDI doesn't support YUV pixel formats; it supports RGB only Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Need Help!! GetDC failed when OffScreenSurface's YUV pixel format in directdraw?

baboguru1-Aug-04 22:45

baboguru

1-Aug-04 22:45

So simple~ OMG | :OMG:

thanks you very much Ryan,
Ryan,, i have one more question(i hope its anwser is simple too.. Smile | :)

)

Is there any ways to overlay texts on the OffScreenSurface(video buffer)
of which pixel format is YUV, not RGB? or is it possible anyhow?

thanks again

Re: Need Help!! GetDC failed when OffScreenSurface's YUV pixel format in directdraw?

Ryan Binns1-Aug-04 23:07

Ryan Binns

1-Aug-04 23:07

baboguru wrote:
Is there any ways to overlay texts on the OffScreenSurface(video buffer)
of which pixel format is YUV, not RGB?

You can get a pointer to the raw image data in memory, which you can write to however you like. There are libraries out there which can abstract this into pixels for various pixel formats (AntiGrain Geometry[^] comes to mind), or you can work out the data yourself. But there are no Windows calls to do it for you.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Need Help!! GetDC failed when OffScreenSurface's YUV pixel format in directdraw?

baboguru2-Aug-04 1:05

baboguru

2-Aug-04 1:05

Thank you Ryan~~ now i know what to do Smile | :)

thank you again

Select Folder Dialog

Archer2821-Aug-04 15:32

Archer282

1-Aug-04 15:32

Anyone know of a class for the common dialog Select Folder i cant seem to find one for MFC,

Re: Select Folder Dialog

Ravi Bhavnani1-Aug-04 16:11

Ravi Bhavnani

1-Aug-04 16:11

Use SHBrowseForFolder() or this[^] class at CP.

/ravi

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Re: Select Folder Dialog

Michael Dunn1-Aug-04 19:26

Michael Dunn

1-Aug-04 19:26

See the FAQ
4.13 How do I prompt the user to select a directory?[^]

--Mike--
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numbers

locoone1-Aug-04 12:59

locoone

1-Aug-04 12:59

i just want to know how to add the letters after a number automaticly like 1st 2nd 3rd 4th 5th the numbers will change day to day

Re: numbers

Archer2821-Aug-04 13:20

Archer282

1-Aug-04 13:20

what i would do is convert the number to a string, then extract the last character and make a switch() statment

if the last character is 1 it will append "st" to the number string
if its 2 it will append "nd" to the number string

you get my point?

need any help on how to go about any of this just ask

Re: numbers

locoone1-Aug-04 17:50

locoone

1-Aug-04 17:50

thanks dude i got it

Re: numbers

Ravi Bhavnani1-Aug-04 14:19

Ravi Bhavnani

1-Aug-04 14:19

Here[^]'s a VB sample. And here[^]'s a Java implementation that you can easily convert to C++.

/ravi

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one more file io (?)

namethatnooneelsetook1-Aug-04 11:56

namethatnooneelsetook

1-Aug-04 11:56

How do you write in mfc to files but manually like
f.write("something");
or similar to that and how do you start a newline in a file output

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