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Re: Pointers to arrays of pointers.

C^hris L^osinger5-Jun-02 3:40

C^hris L^osinger

5-Jun-02 3:40

int *ptrArray[10];
for(int i=0;i<10;i++)
{
   ptrArray[i]= new int[10];
}
...
... whatever
...
for(i=0;i<10;i++)
{
   delete [] ptrArray[i];}

-c

Cheap oil. It's worth it!

ISEffects - effects for images

Re: Pointers to arrays of pointers.

oRion5-Jun-02 17:19

oRion

5-Jun-02 17:19

Thanks for the reply. I udnerstand that is for 1D pointers?

I have come across the code for 2D array pointers using
int **a; // a is a 2D array of size Col 10 x Row 5

int row = 5;
int col = 10;
a = new int*[row];
for (int i=0,i

Re: Pointers to arrays of pointers.

jan larsen6-Jun-02 0:45

jan larsen

6-Jun-02 0:45

oRion wrote:
Thanks for the reply. I udnerstand that is for 1D pointers?
No it was for 2D pointers.
int ** the_array is somewhat like int * the_array[10].

You see, the_array is just a pointer to the first element in the array.
When you say the_array[x] the compiler says: Ok, i take the memory offset of the_array and add the the size of an element times x and then i dereference (or whatever that is called) it.

So, when you declare the_array to be int ** the_array, then you say that you want a pointer to an object that can reside anywhere to a pointer to an object that can reside anywhere.
When you declare the_array to be int * the_array, then you say that you want a pointer to an object that resides on the stack that consists of pointer(s) to object(s) that can reside anywhere.

If an array is statically declared, then you can use the sizeof() operator to get the number of items, otherwise you have to remember the size yourself.

oRion wrote:
how do I actually delete it? I have tried to use
delete[] a;
If the 2D array was declared as you stated, then no, this is not sufficient. You have to traverse the rows and delete[] each column array first, then delete[] the rows array.
If on the other hand the array was declared as int * the_array[10], then you only had to delete[] the column arrays as the rows array is declared on the stack.

"It could have been worse, it could have been ME!"

Anyone Familiar with Visual 1.5????? I need your help

5-Jun-02 2:37

Alrite.. I have a problem where i need to take C code that was written on the 16-bit version of Visual that ran on Win 3.x.. I am not familiar with some of the VBX(Now obsolete) controls that are used in this code. For example, I am running this code on Visual C++ 6.0 and it does recognize the VBX control 'CVBControl'.. I want to know if there is anyway that I could convert this code into the 32-bit Version without redesigning my entire project??
Any advice is good advice..

TIA

Re: Anyone Familiar with Visual 1.5????? I need your help

Mike Nordell5-Jun-02 3:39

Mike Nordell

5-Jun-02 3:39

mtrack81 wrote:
I want to know if there is anyway that I could convert this code into the 32-bit Version without redesigning my entire project??

Yes. Either find a COM (ActiveX or whatever they're called this week) component that does the same thing, or re-implement it yourself. That way you could keep the overall design of the project.

Isn't life a bitch when trying to maintain binary-only stuff that has become obsolete? Wouldn't it have been much better if you had the source code to that control to bring it up-to-date? Maybe there's a reason why the GPL codebase is growing?

Re: Anyone Familiar with Visual 1.5????? I need your help

Michael P Butler5-Jun-02 5:05

Michael P Butler

5-Jun-02 5:05

VBX controls were the 16 bit equilvent of OCX controls. You'll need to either find an upgraded version of your control or subsitute with a new control.

Michael Smile | :)

Errata 1: p. 154, section 'Defusing'. For 'red wire' read 'blue wire'.

Re: Anyone Familiar with Visual 1.5????? I need your help

5-Jun-02 5:33

Does anyone know the Equivalent of 'CVBControl' in VBX for either ActiveX or OCX??

Re: Anyone Familiar with Visual 1.5????? I need your help

Mike Nordell5-Jun-02 6:35

Mike Nordell

5-Jun-02 6:35

mtrack81 wrote:
Does anyone know the Equivalent of 'CVBControl'

<sigh> Why can't people do their own googling before asking here?

It seems the CVBControl is some kind of VB (Visual Basic) wrapper control. As such, I'm fairly certain there is no equivalent for it. VBX'es died with Win16, and that was like... Um... Seven years ago. Smile | :)

Maybe if you look at how it's used/what it's used for you can get a better grasp of what is needed? What does it display/do? When you can answer that question perhaps you find there's already code written to do the same in Win32.

Re: Anyone Familiar with Visual 1.5????? I need your help

Nick Jacobs5-Jun-02 6:55

Nick Jacobs

5-Jun-02 6:55

Mike Nordell wrote:
<sigh> Why can't people do their own googling before asking here?

Now, Now, CodeProject has always been a great learning place. So why not ask these types of questions here? You never know, maybe somebody else out there is having the same sorts of problems.

Nick

Re: Anyone Familiar with Visual 1.5????? I need your help

Mike Nordell5-Jun-02 8:21

Mike Nordell

5-Jun-02 8:21

Nick Jacobs wrote:
So why not ask these types of questions here?

Because it displays they didn't even bother to google first? Smile | :)

But you are probably right. I was a little harsh. I'll try to wrap the old "do your own googling" in something fluffier next time. Smile | :)

Re: Anyone Familiar with Visual 1.5????? I need your help

Ed Gadziemski5-Jun-02 13:55

Ed Gadziemski

5-Jun-02 13:55

How about: Please do your own freakin' googling?

Re: Anyone Familiar with Visual 1.5????? I need your help

Mike Nordell5-Jun-02 18:26

Mike Nordell

5-Jun-02 18:26

Yes, that's good. I think the "Please" did it! Smile | :)

Re: Anyone Familiar with Visual 1.5????? I need your help

5-Jun-02 8:06

I'm pretty sure its main purpose in the project is for grid control. If anyone knows of another method for grid control for 32 bit apps, let me know.. in the meantime.. i'll try to do my own googling to see if there is anything out there...thankz..

Re: Anyone Familiar with Visual 1.5????? I need your help

Mike Nordell5-Jun-02 8:13

Mike Nordell

5-Jun-02 8:13

mtrack81 wrote:
I'm pretty sure its main purpose in the project is for grid control.

Then you're in luck. Not only have Microsoft created a common control for this purpose, if you want something extra this seems to be a good place to look! Smile | :)

Re: Anyone Familiar with Visual 1.5????? I need your help

Michael P Butler5-Jun-02 8:28

Michael P Butler

5-Jun-02 8:28

The best grid that I've used,

http://www.codeproject.com/library/gridprojects.asp

Michael Smile | :)

Errata 1: p. 154, section 'Defusing'. For 'red wire' read 'blue wire'.

CreateProcess( );

Søren Alsbjerg Hørup5-Jun-02 2:24

Søren Alsbjerg Hørup

5-Jun-02 2:24

I'm trying to get my App to luanch a program, like Quake 3.
using CreateProcess();

I got two problems..

One is that Quake 3 looks for a default.cfg in the Defualt dir, but my program changes the defualt dir to the path to my program, so Quake 3 thinks that the default.cfg file is located where my program is located, but it is not.

the second problem is that I can't include consol commands.. like "d:\games\half-life\hl.exe -game cstrike"
This won't work..

code:

CreateProcess( NULL,Game[0].Path,NULL,NULL,FALSE,0,NULL,NULL,&si,&pi );

Any solution to these two problems?

Thanks

Re: CreateProcess( );

SamirSood5-Jun-02 2:19

SamirSood

5-Jun-02 2:19

You can use the APIs like SetCurrentDirectory to change the current working directory of your program

Samir Sood

Re: CreateProcess( );

Søren Alsbjerg Hørup5-Jun-02 2:35

Søren Alsbjerg Hørup

5-Jun-02 2:35

yeah, But if I have a string like: "d:\games\quake3\quake3.exe" and want to set the currentdir
like: SetCurrentDirectory("d:\games\quake3\quake3.exe") I need to remove the quake3.exe but how?.

Re: CreateProcess( );

redeemer5-Jun-02 2:28

redeemer

5-Jun-02 2:28

Use ShellExecute() instead.r to open or explore. The function can open an executable file or a document file. The function can print a document file.

lpParameters

If the lpFile parameter specifies an executable file, lpParameters is an address to a null-terminated string that specifies the parameters to be passed to the application.The format of this string is determined by the verb that is to be invoked. If lpFile specifies a document file, lpParameters should be NULL.

lpDirectory

Address of a null-terminated string that specifies the default directory.

nShowCmd

Flags that specify how an application is to be displayed when it is opened. If lpFile specifies a document file, the flag is simply passed to the associated application. It is up to the application to decide how to handle it.

SW_HIDE	Hides the window and activates another window.
SW_MAXIMIZE	Maximizes the specified window.
SW_MINIMIZE	Minimizes the specified window and activates the next top-level window in the z-order.
SW_RESTORE	Activates and displays the window. If the window is minimized or maximized, Windows restores it to its original size and position. An application should specify this flag when restoring a minimized window.
SW_SHOW	Activates the window and displays it in its current size and position.
SW_SHOWDEFAULT	Sets the show state based on the SW_ flag specified in the STARTUPINFO structure passed to the CreateProcess function by the program that started the application. An application should call ShowWindow with this flag to set the initial show state of its main window.
SW_SHOWMAXIMIZED	Activates the window and displays it as a maximized window.
SW_SHOWMINIMIZED	Activates the window and displays it as a minimized window.
SW_SHOWMINNOACTIVE	Displays the window as a minimized window. The active window remains active.
SW_SHOWNA	Displays the window in its current state. The active window remains active.
SW_SHOWNOACTIVATE	Displays a window in its most recent size and position. The active window remains active.
SW_SHOWNORMAL	Activates and displays a window. If the window is minimized or maximized, Windows restores it to its original size and position. An application should specify this flag when displaying the window for the first time.

Return Values

Returns a value greater than 32 if successful, or an error value that is less than or equal to 32 otherwise. The following table lists the error values. The return value is cast as an HINSTANCE for backward compatibility with 16-bit Microsoft® Windows® applications. It is not a true HINSTANCE,
however. The only thing that can be done with the returned HINSTANCE is
to cast it to an integer and compare it with the value 32 or one of the
error codes below.

0	The operating system is out of memory or resources.
ERROR_FILE_NOT_FOUND	The specified file was not found.
ERROR_PATH_NOT_FOUND	The specified path was not found.
ERROR_BAD_FORMAT	The .exe file is invalid (non-Win32® .exe or error in .exe image).
SE_ERR_ACCESSDENIED	The operating system denied access to the specified file.
SE_ERR_ASSOCINCOMPLETE	The file name association is incomplete or invalid.
SE_ERR_DDEBUSY	The DDE transaction could not be completed because other DDE transactions were being processed.
SE_ERR_DDEFAIL	The DDE transaction failed.
SE_ERR_DDETIMEOUT	The DDE transaction could not be completed because the request timed out.
SE_ERR_DLLNOTFOUND	The specified dynamic-link library was not found.
SE_ERR_FNF	The specified file was not found.
SE_ERR_NOASSOC	There is no application associated with the given file name extension. This error will also be returned if you attempt to print a file that is not printable.
SE_ERR_OOM	There was not enough memory to complete the operation.
SE_ERR_PNF	The specified path was not found.
SE_ERR_SHARE	A sharing violation occurred.

Remarks

This method allows you to execute any commands in a folder's context menu or stored in the registry.

To open a folder, use either of the following calls:

ShellExecute(handle, NULL, path_to_folder, NULL, NULL, SW_SHOWNORMAL);

ShellExecute(handle, "open", path_to_folder, NULL, NULL, SW_SHOWNORMAL);

To explore a folder, use:

ShellExecute(handle, "explore", path_to_folder, NULL, NULL, SW_SHOWNORMAL);

To launch the shell's Find utility for a directory, use:

ShellExecute(handle, "find", path_to_folder, NULL, NULL, 0);

If lpOperation is NULL, the function opens the file specified by lpFile. If lpOperation is "open" or "explore", the function will attempt to open or explore the folder.

With multiple monitors, if you specify the window handle and set lpOperation to "Properties", any windows created by ShellExecute may not appear in the correct position.

To obtain information about the application that is launched as a result of calling ShellExecute, use ShellExecuteEx.

Requirements

  Windows NT/2000: Requires Windows NT 3.1 or later.

  Windows 95/98: Requires Windows 95 or later.

  Windows CE: Unsupported.

  Header: Declared in shellapi.h.

  Import Library: shell32.lib.

Re: CreateProcess( );

Tomasz Sowinski5-Jun-02 3:28

Tomasz Sowinski

5-Jun-02 3:28

Instead of copying MSDN article, just post a link next time.

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: CreateProcess( );

Søren Alsbjerg Hørup5-Jun-02 4:03

Søren Alsbjerg Hørup

5-Jun-02 4:03

Ok I see. But I need a function that returns the path of the file.

Like 'd:\games\quake 3\quake3.exe' will return 'd:\games\quake 3\'

Any function that does this?

thanks.

Re: CreateProcess( );

Tomasz Sowinski5-Jun-02 4:13

Tomasz Sowinski

5-Jun-02 4:13

Visual Basic is great for things like that Big Grin | :-D

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: CreateProcess( );

redeemer5-Jun-02 7:32

redeemer

5-Jun-02 7:32

Just parse the string from right to left, and keep adding a char to a buffer until it encounters a '\'.

Re: CreateProcess( );

JohnnyG6-Jun-02 7:23

JohnnyG

6-Jun-02 7:23

Look up: _makepath, _fullpath, and _splitpath in MSDN Smile | :)

I've used these before.

Pop-up menus of windows icons

5-Jun-02 2:10

Hi,
how it's possible to modify in MFC the pop-up menu that appears when i click on the icon of a window? I've searched something in MSDN but nothing Cry | :((

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C / C++ / MFC

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