Delphi Pascal to C++ - C / C++ / MFC Discussion Boards

Change hard-coded variables from Outside

RedDragon2k18-Feb-06 2:09

18-Feb-06 2:09

Hello,

How can I change a hard-coded variable from another program with my program ?
For example:
Program A has this definition:
CString strTmp = "This is a Test";
somewhere in it's code.

And now I want with my program to change this variable to "This is another Test".
How could I realize this ?

With best regards,
Benedikt

Re: Change hard-coded variables from Outside

David Crow18-Feb-06 6:58

David Crow

18-Feb-06 6:58

You can open the file (as binary) with Visual Studio and search for the string literal. You can't, however, make it any longer.

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Re: Change hard-coded variables from Outside

jc0dex18-Feb-06 15:49

jc0dex

18-Feb-06 15:49

Hello,

First off one quick question ... with the simplicity of scripts why go thru all the trouble to change hard coded varibles? A simple text file and a text parser is like magic sometimes Smile | :)

But as for changing hard coded variables, maybe putting the variable on its own thread and using a mutex would work. Or alternatively you could make one program take key input then use Shell Extensions to run that program inside another program and give it input from the second program.

Just a couple of random, probably nonsensical ideas, hope that helps Smile | :)

Jay

Linux

Hamid_RT18-Feb-06 1:55

Hamid_RT

18-Feb-06 1:55

How to create program for linux

Re: Linux

Nemanja Trifunovic18-Feb-06 14:28

Nemanja Trifunovic

18-Feb-06 14:28

Visible_Info wrote:
How to create program for linux

With gcc[^]

My programming blahblahblah blog. If you ever find anything useful here, please let me know to remove it.

Communicating with services

Anorexic Tribble18-Feb-06 1:52

Anorexic Tribble

18-Feb-06 1:52

What is the best way for a control program to communicate with a system service that I am writing? I have seen that you can send a custom control code, but how can you pass parameters.

How is this generally done? Is it via registry entries?

Re: Communicating with services

George L. Jackson18-Feb-06 2:53

George L. Jackson

18-Feb-06 2:53

I have used MSMQ with a lot of success. Or, you can use remoting from a server. I like the MSMQ solution better because it has built-in solutions to reduce data loss and it scales easily.

-- modified at 10:23 Saturday 18th February, 2006

Delphi Pascal to C++

hutt18-Feb-06 1:49

hutt

18-Feb-06 1:49

Hi,
Need some help translating some structures from Pascal to C++.
Any help would be appreciated.

TWideText = record<br />
  Text: array[1..20] of WideChar;<br />
  Len: Byte;<br />
end;<br />
<br />
TWideComment = record<br />
  Text: array[1..255] of WideChar;<br />
  Len: Byte;<br />
end;<br />
<br />
TChar = record<br />
  Pixels: array[0..9, 0..44] of Byte;<br />
  RTop: Byte;<br />
  Width, Height: Byte;<br />
  Text: TWideText;<br />
  Style: Byte;<br />
  deleted: boolean;<br />
end;<br />
<br />
TChMatrix = record<br />
  Modified: boolean;<br />
  FileName: WideString;<br />
  Comment: TWideComment;<br />
  Char: array of TChar;<br />
end;

Patrik

Re: Delphi Pascal to C++

Michael Dunn18-Feb-06 5:33

Michael Dunn

18-Feb-06 5:33

Example:

struct TChar
{
  unsigned char Pixels[10][45];
  unsigned char RTop, Width, Height;
  TWideText Text;
  unsigned char Style;
  bool deleted;
};

C array indexes always start at 0, so the code that accesses those 1-based arrays will have to change too.

--Mike--
Visual C++ MVP Cool | :cool:

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Re: Delphi Pascal to C++

hutt18-Feb-06 7:46

hutt

18-Feb-06 7:46

Thanks for the answer Mike.

What about WideChar and WideString? These must be data types in DelphiPascal?
WideChar = TCHAR?
So the first struct would be:

struct WideText
{
  TCHAR[20] Text;
  Byte Len;
};

But with WideString I have no idea.

//Patrik

Re: Delphi Pascal to C++

Michael Dunn18-Feb-06 9:45

Michael Dunn

18-Feb-06 9:45

I assume WideChar is a Unicode character, in C that is wchar_t. For a Unicode string, use std::wstring unless you're comfortable with C-style strings.

--Mike--
Visual C++ MVP Cool | :cool:

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Getting source-code text from the VS.Net IDE

Virtek17-Feb-06 22:37

Virtek

17-Feb-06 22:37

Hi.

I'm trying to get the text from the text-editor of another process (VS.Net) but it return nothing.

This is my code:

<br />
HWND hwnd = (HWND)0x008803AC; // This is the VsTextEditPane class handle of VS.Net<br />
<br />
char Data[500];<br />
SendMessage(hwnd, WM_GETTEXT, (WPARAM)500, (LPARAM)Data);<br />
MessageBox(NULL, Data, "The Control Text", MB_OK); // Data is Empty !!! Why ?<br />
<br />

any idia why the WM_GETTEXT doesn't work ?

Thanx

Re: Getting source-code text from the VS.Net IDE

Michael Dunn18-Feb-06 5:35

Michael Dunn

18-Feb-06 5:35

The window might not be designed to respond to WM_GETTEXT. See this blog post[^] for more details.

--Mike--
Visual C++ MVP Cool | :cool:

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Re: Getting source-code text from the VS.Net IDE

Virtek18-Feb-06 6:44

Virtek

18-Feb-06 6:44

Thanks for the respond.

I've tried both ways: SendMessage and GetWindowText, although GetWindowText doesn't work for controls outside the calling process.

both return an empty string Frown | :(

Maybe this is because the text doesn't resides on that "special place" and the only way accessing VsTextEditPane is through the COM interface?

Re: Getting source-code text from the VS.Net IDE

Michael Dunn18-Feb-06 9:46

Michael Dunn

18-Feb-06 9:46

Virtek wrote:
Maybe this is because the text doesn't resides on that "special place" and the only way accessing VsTextEditPane is through the COM interface?

That'd be my guess.

--Mike--
Visual C++ MVP Cool | :cool:

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SubclassWindow question

Yak7717-Feb-06 19:04

Yak77

17-Feb-06 19:04

Hi,

I have created an MFC owner drawn control (Derived from CButton) that needs to do some initialization after it is created or subclassed. If the user explicitly calls MyCtrl.Create( .... ), I can handle the OnCreate() message in my control, so no problems.

However, if the user attaches the control through DDX, this results in SubclassWindow being called and OnCreate() is never called. I know you can handle PreSubclassWindow() before the window is actually subclassed, but I need to do some initialization after it is subclassed. So Is there anyway in my class to know after it has subclassed a window?

Thanks in advance for any help.

Re: SubclassWindow question

Michael Dunn18-Feb-06 5:37

Michael Dunn

18-Feb-06 5:37

You can override SubclassWindow(). Call the base class SubclassWindow(), then do your special processing after that call returns.

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | NEW!! PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

embedding resource inside win32 dll

act_x17-Feb-06 18:21

act_x

17-Feb-06 18:21

Say I have a binary resource / text file . Is there a way i can embedded this as part of my VC 6 created DLL .

Now I have a similar project which can be compiled as a static library . TO be able to access the resource (.rc)

I need to access the resources by obtaining the Application handle by doing something like

AfxGetApp()->LoadResource

For a static lib this will point to the application that links using this library . Is there a way I can still access my embedded resources ?

Engineering is the effort !

Re: embedding resource inside win32 dll

Waldermort17-Feb-06 18:57

Waldermort

17-Feb-06 18:57

Sorry, I don't mean to hijack your thread but I have a similar question along the same lines.

I want to export a very small class into a dll, which would also contain a .rc file with 30 or so wav files. Most of the tutorials on this website are either just too complicated to understand or are MFC related. In simple terms, how do you create a win32 dll, containing a .rc file and and a class?

Re: embedding resource inside win32 dll

Gavin Taylor19-Feb-06 2:41

Gavin Taylor

19-Feb-06 2:41

I'm not completely sure what your asking as the message as it isn't really clear...

If looking to load a resource from your library and not the calling executable you can use the GetModuleHandle[^] API passing NULL as the module name, this will then return a handle to your library. You can then use the LoadResource[^] API as per usual.

Gavin Taylor
w: http://www.gavspace.com

Random move

eivanlo17-Feb-06 16:41

eivanlo

17-Feb-06 16:41

May I ask you all how to make an item moves randomly in a board game pls?

Re: Random move

_AnsHUMAN_ 17-Feb-06 17:22

_AnsHUMAN_

17-Feb-06 17:22

use rand() to generate two random numbers and set the coordinates of the window using SetWindowPos() .
That's all buddy.
*Of course you will have to set a timer to change the position in a specified interval of time

Wishes.

Anshuman Dandekar

Dare to Dream,
Care to Achieve.............

Question about recursion

ericelysia17-Feb-06 15:35

ericelysia

17-Feb-06 15:35

Hello,

I am trying to understand recursion by using the following example.

   <br />
#include <iostream><br />
#include <iomanip><br />
<br />
using namespace std;<br />
<br />
unsigned long factorial( unsigned long ); // function prototype<br />
//-------------------------------------------------------------------------<br />
int main()<br />
{<br />
   // Loop 4 times. During each iteration, calculate factorial( i ) and display result.<br />
   for ( int i = 0; i <= 4; i++ )<br />
   {<br />
	  cout << "\n i = " << i << endl;<br />
	  cout << endl << setw( 2 ) << i << "! = " << factorial( i ) << endl;<br />
   }<br />
   return 0;  // indicates successful termination<br />
<br />
} // end main<br />
//-------------------------------------------------------------------------<br />
// recursive definition of function factorial<br />
unsigned long factorial( unsigned long number )<br />
{<br />
   // base case<br />
   if ( number <= 1 )  <br />
   {<br />
      return 1;<br />
   }<br />
   // recursive step<br />
   else  <br />
   {<br />
	  cout << endl << "number = " << number << "    factorial(number - 1) = " << factorial(number - 1) <br />
		   << "    number * factorial(number - 1) = " << number * factorial( number - 1 ) << endl;          <br />
      return number * factorial( number - 1 );<br />
   }<br />
} // end function factorial<br />
//-------------------------------------------------------------------------<br />
/*<br />
output:<br />
<br />
 i = 0<br />
<br />
 0! = 1<br />
<br />
 i = 1<br />
<br />
 1! = 1<br />
<br />
 i = 2<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
 2! = 2<br />
<br />
 i = 3<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 3    factorial(number - 1) = 2    number * factorial(number - 1) = 6<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
 3! = 6<br />
<br />
 i = 4<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 3    factorial(number - 1) = 2    number * factorial(number - 1) = 6<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 3    factorial(number - 1) = 2    number * factorial(number - 1) = 6<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 4    factorial(number - 1) = 6    number * factorial(number - 1) = 24<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
number = 3    factorial(number - 1) = 2    number * factorial(number - 1) = 6<br />
<br />
number = 2    factorial(number - 1) = 1    number * factorial(number - 1) = 2<br />
<br />
 4! = 24<br />
Press any key to continue<br />
*/<br />

I do understand that when i = 0, the base case is true, therefore 1 is returned. 0! = 1

When i = 1, the base case is true and 1 is returned. 1! = 1

When i = 2, the base case is not true, so number * factorial( number - 1 ) is returned, which is 2 * factorial( 1 ). 2 * 1 = 2. 2 is returned. 2! = 2

At this point, I have a question. The next line says i = 3. Then it says number = 2. How does number become 2 if i = 3?

Thanks,
Eric

Re: Question about recursion

Michael Dunn17-Feb-06 16:22

Michael Dunn

17-Feb-06 16:22

The recursive calls have to complete before the output can be sent to cout. So what you're seeing is the output from the deepest recursive call first.

--Mike--
Visual C++ MVP Cool | :cool:

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Re: Question about recursion

ericelysia17-Feb-06 16:36

ericelysia

17-Feb-06 16:36

Hasn't the output already been sent to cout? The program already output 2! = 2 and i = 3.

At the point in the program where i = 3 is output, doesn't that signify the beginning of a new iteration?

Thanks,
Eric

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