Call Windows Explorer after save files - C / C++ / MFC Discussion Boards

Mohammad A Gdeisat21-Sep-06 6:13

21-Sep-06 6:13

hi
I am programming for windows ce, and I need to know how to change a file type association using c++, what functions should I call to change the program that opens a specific file type (eg: .mp3)???

Thanks alot

Mohammad

And ever has it been that love knows not its own depth until the hour of separation

array input using edit box

Cyclone0221-Sep-06 5:27

Cyclone02

21-Sep-06 5:27

Hi guys

I have been trying to make an app that gets the arra input from the user for ex:

I have made a variable for an edit box and named it BYTE m_bytes then i make another edit box and add the variable BYTE m_arrayinput thne i make a function like this:

void whatever()<br />
{<br />
     UpdateData(true);<br />
     <br />
     BYTE myarray[m_bytes] = {m_arrayinput};<br />
}

now what i want to do with this code is to for example the user enters:

Bytes: 2<br />
<br />
Array Input: 0x60, 0x90

then i want the function to interpret it as:

void whatever()<br />
{<br />
     UpdateData(true);<br />
     <br />
     BYTE myarray[2] = {0x60, 0x90};<br />
}

but this code does not work and i havnt got a clue of how to make it work so could someone please help me?

Thanks in advance

Cyclone

Re: array input using edit box

Zac Howland21-Sep-06 5:39

Zac Howland

21-Sep-06 5:39

Cyclone02 wrote:
BYTE myarray[2] = {0x60, 0x90};

This won't work that way. The CEdit data is a string, so you will have to parse that string and assign it to each element in the array.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: array input using edit box

David Crow21-Sep-06 6:59

David Crow

21-Sep-06 6:59

Cyclone02 wrote:
I have made a variable for an edit box and named it BYTE m_bytes...

You should be using a CEdit member variable for an edit control.

"Talent without discipline is like an octopus on roller skates. There's plenty of movement, but you never know if it's going to be forward, backwards, or sideways." - H. Jackson Brown, Jr.

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Re: array input using edit box

Cyclone0221-Sep-06 7:15

Cyclone02

21-Sep-06 7:15

for both of the variables? or just the bytes one?

Re: array input using edit box

David Crow21-Sep-06 7:28

David Crow

21-Sep-06 7:28

For the one associated with the edit control. That way all you have to do is call SetWindowText() or GetWindowText() (into a CString object).

Re: array input using edit box

Cyclone0222-Sep-06 5:59

Cyclone02

22-Sep-06 5:59

i tried doing that but it doesnt work i made a variable called CEdit m_bytes then i did this to the array:

Array[m_bytes] = {m_patch};

but all i got were a lot of errors Frown | :(

Call Windows Explorer after save files

Max++21-Sep-06 5:19

Max++

21-Sep-06 5:19

I want to save some file to harddisk such as C:\\Data\\Mydata.txt and then I want to call Window Explorer to open at the page" C:\\Data" automatically.

Anybody know, how to write the code for this issue.

Re: Call Windows Explorer after save files

toxcct21-Sep-06 5:39

toxcct

21-Sep-06 5:39

::ShellExecute(NULL, "open", "C:\\Data", NULL, NULL, SW_SHOW);

TOXCCT >>> GEII power

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Dialog don't get focus back [modified]

jsumm21-Sep-06 4:34

jsumm

21-Sep-06 4:34

Hello,

how can I set the focus to my SDI-applications toplevel window?
Problem: I have an application. The main dialog creates dynamically a subdialog which is displayed and has the focus. This subdialog creates and executes a thread. This thread creates also dynamically a (error-)dialog which is closed by buttonclick or automatically after some seconds. After the thread created subdialogs closes, I want to have back the focus on my applications top level window, which is the window who creates the thread. Til now, the main dialog receives the focus.
Any ideas?

Thanks
Juergen

-- modified at 10:55 Thursday 21st September, 2006

Comparing enum types

Waldermort21-Sep-06 4:25

Waldermort

21-Sep-06 4:25

Just changed a few #defines into enum, and now getting compiler errors. How are enum types compared?

typedef enum tile_from_t 
{ 
NORTH=0,EAST,SOUTH,WEST
} TILEFROM, SEAT, *LPSEAT;

bool cTiles::VerifySeat( const LPSEAT sSeat )
{
    switch ( m_sNumPlayers )
    {
    case 2:
        if ( sSeat == NORTH || sSeat == SOUTH )
            return true;
    case 3:
        if ( sSeat >= EAST && sSeat <= WEST )
            return true;
    case 4:
        if ( sSeat >= NORTH && sSeat <= WEST )
            return true;
    default:
        return false;
    }
}

Re: Comparing enum types

Zac Howland21-Sep-06 4:44

Zac Howland

21-Sep-06 4:44

waldermort wrote:
bool cTiles::VerifySeat( const LPSEAT sSeat )

waldermort wrote:
if ( sSeat == NORTH || sSeat == SOUTH )

You are comparing the pointer to the enum constants here. You can avoid this by just declaring the method as:

bool cTiles::VerifySeat(SEAT sSeat)

Using a const-reference or pointer for this method doesn't gain you anything.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: Comparing enum types

Waldermort21-Sep-06 5:21

Waldermort

21-Sep-06 5:21

Doh!!

Another question if I may.
Is it possible to increase the enum type? In my previous code I used this formula to get the next seat
m_sActiveSeat = (m_sActiveSeat+1)%4;
However this cause the compile error
cannot convert from 'int' to 'enum tile_from_t'
I also tried
m_sActiveSeat++
which would be great if it wrapped around, but still no success.

Is there a simple way to do this rather than using a switch?

Re: Comparing enum types

Zac Howland21-Sep-06 5:36

Zac Howland

21-Sep-06 5:36

enums in C++ are basically just named integer constants. They won't wrap around automatically. You can write your own wrapper for Enums (I actually have an article on here somewhere that makes a pretty good cut at it), or you can use const int's instead. Since you said you were coming from #define's, I would recommend using the latter.

const unsigned long NORTH = 0;
const unsigned long EAST = 1;
const unsigned long SOUTH = 2;
const unsigned long WEST = 3;

// and the function call
void myFunc(unsigned long direction)
{
	switch (direction)
	{
	case NORTH:
	case SOUTH:
	case EAST:
	case WEST:
		doSomething();
		break;
	default:
		throw exception("Oooops!");
	}
}

To make sure it is always valid, you could use your modulo operation as well.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: Comparing enum types

Waldermort21-Sep-06 5:45

Waldermort

21-Sep-06 5:45

Using a const would be a better choice, but unfortunatly it would conflict with other parts of the program that are better of being enums.

I found an excellent article on enum types here[^], which helped me solve the problem.

m_sActiveSeat = SEAT(m_sActiveSeat+1);<br />
if ( m_sActiveSeat > WEST ) m_sActiveSeat = NORTH;

Receive broadcast UDP

jeron121-Sep-06 4:14

jeron1

21-Sep-06 4:14

Hi everyone,

I have a scenario where I wish to send and receive broadcast UDP packets to and from an embedded piece of hardware. The embedded hardware listens for a certain broadcast UDP packet (on port 46051), and responds with a single broadcast UDP packet (to port 46050). The HW and PC are connected directly together. The embedded HW does not transmit anything else. I can transmit a broadcast UDP packet (as seen by Ethereal) and the HW sends its response usually within 375us (which can also be seen by Ethereal) but my app never receives the data. When I connect my PC to another PC running a microsoft UDP sample program (msocupd) which can send broadcast UPD packets, my app does get the data. I noticed that when the 2 PC's were linked together, all sorts of packets were being exchanged (ARP requests, etc..) whereas the embedded HW doesn't transmit anyting. Can what I wish to do be done using sockets?

Thanks in advance,
Jeron

Re: Receive broadcast UDP

Eytukan21-Sep-06 6:17

Eytukan

21-Sep-06 6:17

Did you set IP_ADD_MEMBERSHIP using setsockoptin the application running in your Embedded Device?

Eg:
setsockopt(hSock,IPPROTO_IP,IP_ADD_MEMBERSHIP...

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Re: Receive broadcast UDP

jeron121-Sep-06 7:17

jeron1

21-Sep-06 7:17

Found it...The person who wrote the embedded device assured me that his packet was good...but I found an issue with the 'Total Length' field in the IP header, it was off by 1. As soon as he made the change, my app got the data (my hairline is thankful). Oddly enough Ethereal (which is a great product) didn't make mention of this discrepency. Luckily we had an old Agilent packet analyzer which clued me in. I really appreciate your response. Smile | :)

Jeron

To reduce the duplication of exes

johnalek21-Sep-06 3:44

johnalek

21-Sep-06 3:44

in my project require to run the exe multiple times,at the same time when new exe of same project is run then immediately previous instatiation of that exe is neceaasry to close.ie when new instance is open then previous insatace should close.please kindely help in my project.

#sanroop#

Re: To reduce the duplication of exes

toxcct21-Sep-06 3:48

toxcct

21-Sep-06 3:48

Sanroop wrote:
please kindely help in my project.

for that, you will have to express yourself a bit more clearly,because i don't really understand what you're trying to explain...

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: To reduce the duplication of exes

Eytukan21-Sep-06 3:48

Eytukan

21-Sep-06 3:48

What's the use of closing the old one and running the new one? why not you stop the new one instead?

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[My Current Status]

Link2006 wrote:Let's take it outside of CP
Jeremy : Please don't.I would love to see this.I'm making the popcorn already.

Re: To reduce the duplication of exes

David Crow21-Sep-06 4:11

David Crow

21-Sep-06 4:11

Is this what you are looking for?

Linking Error : can not select the ...........

Y_Kaushik21-Sep-06 3:16

Y_Kaushik

21-Sep-06 3:16

Hi All's
i used MySQL 5.0 as an databases in my project But
in my PC there are not any library for connecting Front End (VC++)

can i download it from net and simply copy in my PC
or
i have to again download the MySQL from net and then instroled it.

what i have to do now .Please Help Me

Thanking to all of you

mailing me
Yogi

Re: Linking Error : can not select the ...........

David Crow21-Sep-06 3:18

David Crow

21-Sep-06 3:18

Can't you just use ODBC or ADO?

Re: Linking Error : can not select the ...........

Eytukan21-Sep-06 3:59

Eytukan

21-Sep-06 3:59

What about going the ADO way?

#import "C:\Program Files\Common Files\System\ADO\msado15.dll" \
no_namespace rename("EOF", "EndOfFile")

I use the above ADO COM dll for my DBs. That's cool.

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[My Current Status]

Link2006 wrote:Let's take it outside of CP
Jeremy : Please don't.I would love to see this.I'm making the popcorn already.

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