Re: Dialogue Bitmaps - C / C++ / MFC Discussion Boards

Ramu Pulipati26-Jun-02 18:32

26-Jun-02 18:32

You have to advise the button events (_CommandBarButtonEvents) from m_pButton and add event handlers to the sink map.

Hth,
Ramu

m_hWnd

Anthony988726-Jun-02 9:08

Anthony9887

26-Jun-02 9:08

I created a stand alone MFC dialog box. After debugging I noticed that m_hWnd is always NULL. I'm trying to get the handle to the dialogbox.

Thanks

Re: m_hWnd

Joaquín M López Muñoz26-Jun-02 9:32

Joaquín M López Muñoz

26-Jun-02 9:32

This handle will be null until you create the dialog with Create or indirectly with DoModal ---having the CDialog constructed does not suffice.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Data Transfer: DLL -> VB (UDT Array with Strings)

Ryan B.26-Jun-02 8:58

Ryan B.

26-Jun-02 8:58

I am receiving data from a socket server (QNX based) into a VC++ DLL. the data is in the format

struct Data {
short num;
unsigned long value;
char name[33];
}

I am receiving a message containing large numbers of these data strucutres. I can store them fine in my DLL, i have adjusted the byte packing and everything works great. Now, I have to move the data from my DLL into Visual Basic. I have read competing articles (by microsoft) on the proper way to fill a UDT Array passed from vb. I have tried many things including the use of a Type Library.

I would like to pass in a reference to the UDT Array from VB to C++ DLL, and populate it with the data i received from the QNX process. I am having trouble with both fixed strings and variable length strings. Please help. Please Please Please help. This has gotten very frustrating..

Any Help would be greatly appreciated.

Ryan Baillargeon
Software Specialist
Fuel Cell Technologies Inc.

Dialogue Bitmaps

EBerlin26-Jun-02 8:52

EBerlin

26-Jun-02 8:52

I am currently having trouble with MFC Confused | :confused:

What I am trying to accomplish is as follows; When a user double clicks the mouse on a section of the dialogue window a bitmap would be displayed at the location of the doubleclick.

The Problem; I cant seem to find any code that would allow me to do this. All code I have found either loads a bitmap when the window is created or will not funcion in a dialogue window.

This is my first post here at TheCodeProject. If I did not post in the right place or did not follow a proper convention please let me know so I can remedy it.

Thanks,
Eric

Re: Dialogue Bitmaps

Christian Graus26-Jun-02 12:12

Christian Graus

26-Jun-02 12:12

EBerlin wrote:
This is my first post here at TheCodeProject. If I did not post in the right place or did not follow a proper convention please let me know so I can remedy it.

Wow - are we that scary ? You've done well, you've found the right spot. Welcome to CP !!!

You need to load the bitmap into a member variable, then on double click draw it in the correct location. You'd therefore need to store a point to represent where the thing is drawn, and maybe initialise it to -1, -1, and draw only if it is positive numbers, so it appears on the first double click and then moves when you click elsewhere.

Christian

I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002

Half the reason people switch away from VB is to find out what actually goes on.. and then like me they find out that they weren't quite as good as they thought - they've been nannied. - Alex, 13 June 2002

Re: Dialogue Bitmaps

EBerlin27-Jun-02 7:09

EBerlin

27-Jun-02 7:09

Thanks for your quick response.

Just repeating my interpretation of your response.

So make a local var of type CBitmap then map "double left click" and in that function use the CPoints X, Y coordinates and draw the bitmap at that location.

Using the bitmap, (and I think DC mem as well) how do I think display the bitmap?

Do you have a link to some sample code I could look at?

Thanks again for your help

Eric

Re: Dialogue Bitmaps

Christian Graus27-Jun-02 11:07

Christian Graus

27-Jun-02 11:07

EBerlin wrote:
So make a local var of type CBitmap then map "double left click" and in that function use the CPoints X, Y coordinates and draw the bitmap at that location.

No, you need to store the location as well, so it gets redrawn when the window gets moved, etc.

EBerlin wrote:
Using the bitmap, (and I think DC mem as well) how do I think display the bitmap?

In OnEraseDC, call the base method first, then draw the bitmap. Yes, you'll need a memDC to hold the bitmap while drawing

EBerlin wrote:
Do you have a link to some sample code I could look at?

Sorry, no. But if you give that a go and get stuck, I'm happy to help.

Christian

I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002

Half the reason people switch away from VB is to find out what actually goes on.. and then like me they find out that they weren't quite as good as they thought - they've been nannied. - Alex, 13 June 2002

Outlook Express data format

Mike_Beard26-Jun-02 8:14

Mike_Beard

26-Jun-02 8:14

Does anyone know what the format of the Outlook Express storage file is or where to find the format for it?

My problem in a nutshell is this: I want to be able to filter out all of the spam emails from my Hotmail accounts. I've looked around and tried many of the shareware/trialware programs out there that claim to do this, but have had no luck with them working. So, instead of trying to find a program that does what I want, I'll have to (try) write one instead. The only problem is that I don't know the format of the DBX files that Outlook Express is using.

Before I spend a lot of time trying to figure out the format by example, I thought I'd see if anyone here knows what it is of has seen it described anywhere. What would be even better is if someone has already written a class that handles this (though I'm not too optomistic about that).

So, can anyone help me with this?

Thanks in advance for any help or pointers!

Mike

Re: Outlook Express data format

Ramu Pulipati26-Jun-02 8:22

Ramu Pulipati

26-Jun-02 8:22

FYI, MSDN has articles abt Outlook Express format!

Thanks,
Ramu

Re: Outlook Express data format

Mike_Beard26-Jun-02 10:16

Mike_Beard

26-Jun-02 10:16

Thanks for the response!

If you could post some of the URL's that would be great! I've searched many different times and didn't find anything that I thought was useful. It is entirely possible that I didn't search with the right keywords or that I just overlooked articles with the relevant information.

Thanks again!

Re: Outlook Express data format

C^hris L^osinger26-Jun-02 8:27

C^hris L^osinger

26-Jun-02 8:27

can't help with the DB layout.

but, IMO, it's probably easier to go at it at the source - at the mail transport level. i think Outlook Express supports MAPI. if so, you could write an app that scans your inbox looking for files that match patterns, and delete the ones that do. this app does something like that: http://www.smalleranimals.com/snoop.htm. it's not too complicated to do.

-c

Garbage collection, making life better - for weenies!

Image Processing - now with extra cess.

Re: Outlook Express data format

Mike_Beard26-Jun-02 10:13

Mike_Beard

26-Jun-02 10:13

Thanks for the reply Chris!

After seeing the great (and daunting) data that Ernest posted, I am beginning to think you're right.

I was hoping for something that I could do in a couple of days (it doesn't have to be pretty, it just needs to work) but this has the appearance of a full fledged, several weeks project. More time than I want to put in, I think.

Re: Outlook Express data format

Ernest Laurentin26-Jun-02 8:58

Ernest Laurentin

26-Jun-02 8:58

File format for Outlook Express 5.0 DBX files

Header:

These are the values we use to see what type the file is.

0x0 Signature [16/32 bytes]
= 4A4D4636 03001000 /* OE4 SIGNATURE */
= CFAD12FE C5FD746F 66E3D111 9A4E00C0 /*OE5 Email DBX*/
= CFAD12FE C6FD746F 66E3D111 9A4E00C0 /*OE5 Folder DBX*/

As I said, we use these values to identify it, but we don't know
what these values mean

0x5C Highest Email ID [4 bytes]
This is the current highest. The next email will have a number
one higher than this.

0x7C File Size [4 bytes]
Total size of file

0xC4 Item Count [4 bytes]
Number of items stored in this DBX file. Appears to be
accurate. We use it as a second check that we haven't gone wrong
whilst reading the indexes.

0xE4 Index Pointer [4 bytes]
File offset pointing to a page of Data Indexes. This page can
even be a page of Indexes pointing to pages of indexes. This area
needs to be explored a little more

Indexes: (pointed to by the pointer in 0xE4)

This area is a little blurry, but it appears to work

0x0 Self [4 bytes] - Current Offset
0x4 Unknown [4 bytes]
0x8 Table Pointer [4 bytes] - Pointer to another of these tables
0xC Parent [4 bytes] - If this is a table of indexes which is
referenced by another table above it,
this will point to the parent's table
0x10 Unknown [1 byte]
0x11 Pointer Count [1 byte] - Number of pointers in this table
0x12 Unknown [2 bytes]
0x14 index Count [4 bytes] - I'm not sure
Size = 0x18

Straight after this comes [Pointer Count] entries like this

0x0 Index Pointer [4 bytes] - Pointer to a data block
0x4 Table Pointer [4 bytes] - Pointer to another Table of indexes
0x8 Index Count [4 bytes] - Not sure. If non-zero [Table Pointer]
has more indexes?
Size = 0x0C

These [Index Pointer] items point to offsets in the file which are
data items. At present Emails and Folders have been worked on.

Item Header:
0x0 Self [4 bytes] - current offset
0x4 Size [4 bytes] - size of block that follows
0x8 Unknown [2 bytes]
0xA Count [1 byte] - number of items in the block before the data
starts
0xB Unknown [1 byte]
Size = 0x0C

Then comes [Count] number of items:
0x0 type [1 byte] - specifies what the data is
0x1 value [3 bytes] - actual data

The following types have been found for Emails
Type - Value
0x02 -
0x04 - buffer pointer to file offset of email data
0x05 - buffer pointer to asciiz string containing the subject of email
0x06 -
0x07 - buffer pointer to asciiz message id of email
0x08 - buffer pointer to asciiz another string containing the subject of
email
0x09 -
0x0B -
0x0A - buffer pointer to asciiz message ids of parent emails
0x0C -
0x0D - buffer pointer to asciiz Name of sender
0x0E - buffer pointer to asciiz Email address of sender
0x11 -
0x12 -
0x13 - buffer pointer to asciiz Name of recipient
0x14 - buffer pointer to asciiz Email address of recipient
0x1A -
0x1B -
0x1C -
0x80 - Numeric ID (numeric)
0x81 -
0x84 - file offset to email data
0x90 -
0x91 -

The following have been discovered for Folder Items
Type - Value
0x01 -
0x02 - Buffer Pointer to Descriptive name of Folder
0x03 - Buffer Pointer to Filename of Folder
0x05 -
0x06 -
0x80 - Folder's ID (numeric)
0x81 - Folder ID of parent (numeric)
0x86 -
0x87 -
0x8A -

When handling blocks of data (as in Emails) the offset pointer will
point to the following structure:

0x0 Self [4 bytes] - current offset
0x4 Size [4 bytes] - size of block
0x8 Data Size [2 bytes] - size of data inside block
0xA Item Count [1 byte] - number of int size objects before data
0xB Unknown [1 byte]
0xC Next address [4 bytes] - File offset of next data block
Size = 0X10

Last Article:
Client/Server Socket class

Re: Outlook Express data format

Mike_Beard26-Jun-02 10:05

Mike_Beard

26-Jun-02 10:05

Wow!!! That looks like fun.

Thanks for the response. I think you've given me enough to think about as to whether I want to continue on with this or to try and find a program that does what I need (or at least close to what I need).

At least now, if I look at one of the files, I should have a better idea of what is going on.

Thanks again!

Cryptic Error popup

Jerry Wang26-Jun-02 7:56

Jerry Wang

26-Jun-02 7:56

Hi All,

Has anyone encountered:
An unnamed file was not found

error message box popup in your application before?

It happens when I run the release version of my MFC program outside of MS Visual Studio. When run inside visual studio, both debug and release versions have no errors...

Comments? Inputs?

Thanks.

Re: Cryptic Error popup

Ramu Pulipati26-Jun-02 8:20

Ramu Pulipati

26-Jun-02 8:20

This is MFC framework error message.

This will be occur when you try to open a file which doesnt exist physically.

If this problem occurs in InitInstance()..then manually populate the
CCommandLineInfo Object.

For more info, let us know what u r doing!

Hth,
Ramu

Re: Cryptic Error popup

Jerry Wang26-Jun-02 9:25

Jerry Wang

26-Jun-02 9:25

Thanks You for your help!

Thanks to your note, I found the problem in one of my destructors. It was attempting to delete a file that does not exist.

<br />
	CFileStatus	fileStatus;<br />
	// and get file status and test if the file exists<br />
	CFile::GetStatus("temp.satdef", fileStatus);<br />
<br />
<br />
	// m_attribute	==	0xCC if does not exist<br />
	//				+	0x10 if it's a directory<br />
	//				-	0x04 if it's a system file<br />
	//				-	0x08 if it's a volume<br />
	//			===============================<br />
	//			    ==	0xD0 if it does not exist or if it's a directory<br />
<br />
	if (!(fileStatus.m_attribute & 0xD0))<br />
		CFile::Remove("temp.satdef");<br />

Apparently, somehow, my fileStatus check sometimes doesn't work all the time.

STL ?

Rage26-Jun-02 7:38

Rage

26-Jun-02 7:38

Can anyone decode this piece of code for me ??

template <typename Type>
std::list<const bla*> * blou::bli() 
{
  return getObjectDescriptor().template listSonsOfType<Type>( );
}

I think there must be some STL (which i do not know at all) in the thing, but i quite do not understand the last line : what´s this .template ? and what is here really returned ? is this a cast or something ??

~RaGE();

Re: STL ?

Joaquín M López Muñoz26-Jun-02 8:33

Joaquín M López Muñoz

26-Jun-02 8:33

Well, this a rather obscure use of the template keyword caused by the extremely clumsy C++ syntax. getObjectDescriptor() returns an object of some class for which a template member function listSonsOfType is defined as in this example:

class CObjectDescriptor
{
...
template <typename T> std::list<const bla *> * listSonsOfType();
...
};

Now the line (without the template keyword)

return getObjectDescriptor().listSonsOfType<Type>( );

could be interpreted as a call to the member function or as an expression involving the operators "less than" and "greater than". In this case, the latter doesn't have any meaning, but C++ gurus found pathological examples in which both interpretations are valid. To disambiguate, one must include template.
By the way, this piece of code won't even approach to compile in VC++, which lacks template member function support.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: STL ?

Rage26-Jun-02 21:48

Rage

26-Jun-02 21:48

OK. Thank you very much.

~RaGE();

Can you use a template class member variable within a template class?

26-Jun-02 6:56

Can someone explain why the following doesn't compile:

#include < list >

template < class TYPE > class CNeighbourhoodArray
{
	CNeighbourhoodArray()
	{};
	~CNeighbourhoodArray()
	{};

	list < int > foo_list;
};

Is it illegal in C++ to use a template class as the type of a member variable of another template class? Did that make sense ? Wink | ;)

TIA,

Pete

Re: Can you use a template class member variable within a template class?

C^hris L^osinger26-Jun-02 7:04

C^hris L^osinger

26-Jun-02 7:04

Anonymous wrote:
Can someone explain why the following doesn't compile

what error do you get?

-c

Garbage collection, making life better - for weenies!

Image Processing - now with extra cess.

Re: Can you use a template class member variable within a template class?

26-Jun-02 7:05

Sorry, I forgot to include the error...

c:\pete\capture\vss\neighbourhoodarray.h(25) : error C2143: syntax error : missing ';' before '<'
c:\pete\capture\vss\neighbourhoodarray.h(26) : see reference to class template instantiation 'CNeighbourhoodArray<type>' being compiled

HTH,
Pete

Re: Can you use a template class member variable within a template class?

Joaquín M López Muñoz26-Jun-02 7:05

Joaquín M López Muñoz

26-Jun-02 7:05

This is perfectly legal, the only missing thing is the std:: prefix:

include < list >
template < class TYPE > class CNeighbourhoodArray
{
	CNeighbourhoodArray()	{};
	~CNeighbourhoodArray()	{};
	std::list < int > foo_list;
};

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

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