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Actually, I am using a DLL and I want to acces its functions from VB.Net.
Can you please give me an example, how to modify the codelines, so that the functions will be supported/accesible from VB?
C++:
public class ChatService{
...
int sendMessage(int iAddress, char* pcMessage);
}
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Hi all;
I have followed the instructions in MSDN for creating a bitmap button on a dialog box:
that is, I have drawn my bitmaps and named them accordingly with suffixes "U", "D", "F" and "X".
Then I have drawn my button on the dialog box, checking "Owner draw" in properties and with caption the name of the bitmaps without the above suffixes.
I have named a variable of type CBitmapButton in the dialog class and called the AutoLoad in 'OnInitDialog()' function as follows:
VERIFY(okBtn.AutoLoad(IDOK, this));
And I get an "ASSERT" error at this line:
ASSERT(FromHandlePermanent(hWndNew) == NULL);
What's the problem and what can I do?
_Lostris.
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Hi there,
I have a requirement within a C++ MFC project to simulate the clicking of a button control from within a function in my app.
For this control, I have an OnButton1 message handler for the BN_CLICKED message. Obviously, when this button is clicked, the associated code within this handler is executed. However, I also want to be able to call this handler from within another function, thus simulating the user clicking this control. I understand that I need to send a BN_CLICKED message using the SendMessage function. For example:
void CMessagesDlg::OnButton1()
{
CString text = "The BN_CLICKED message was sent to the IDC_BUTTON1 control";
MessageBox(text);
}
void CMessages::OnButton2()
{
CWnd *pCalc = NULL;
pCalc = GetDlgItem(IDC_BUTTON1);
pCalc->SendMessage(BN_CLICKED);
}
The idea here is the user can click button1 to have the text string displayed. But also, the user can click button2 to display the same text string, by sending the BN_CLICKED message to the button1 control
Whilst the above code compiles, links and is free of run-time errors, nothing actually happens when the user clicks button2!!
What could I be doing wrong - any advice is greatly appreciated
Adrian Langford
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Here is one solution.
::SendMessage(hWnd, WM_COMMAND, MAKELONG(ButtonID, BN_CLICKED), reinterpret_cast<lparam>(ButtonHandle));
kuphryn
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Hello
Is it possible to use an itoa function in an win32 application??? because I'm trying to use it and i get an error: can not locate xtoa.c and it asks me for the path and if I cancel that I will get an unhandle exception. how can I do a conversion from int in char if I can not use itoa???(in win32 application I can not use sprintf and other functions like this...)
Tx
Mirelutza
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You are calling the routine wrong.
Why can't you use sprintf?
Tim Smith
I'm going to patent thought. I have yet to see any prior art.
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If I use sprintf is the same problem. I get the message that it can not find sprintf.c . What I am trying to do is to print in an listbox some messages that I do not have them all at once, so I am using a string array in order to do this by sending a message to the specific listbox. I'm concatenating the message and I have to use an integer value in the string message. That's what i'm trying to do!
Mirelutza
Tx
Mirelutza
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sorry but sprintf(), itoa()... are ANSI (so standard) C functions. they are not dependant on wether they are used on Win32, MFC, Console...
did you include the right header file in your project ?
if so, do you use the right library ?
TOXCCT >>> GEII power
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Hi!
I included the libraries stdio.h and stdlib.h and I think is good. But still I'm doing something wrong... and I do not know what...
tx anyway
Mirelutza
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The only reason you would be seeing that message is if you are trying to step into the routines in the debugger. I would guess that you are doing this because the routines are crashing. They are crashing because you are calling them wrong.
Tim Smith
I'm going to patent thought. I have yet to see any prior art.
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This is the way I'm using it:
int crttime=0;
char buff[30];
itoa(crttime,buff,10);
is it wrong???
10x,
Mirelutza
Mirelutza
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itoa(crtime,buff,10);
should read
itoa(crtime,&buff,10);
Ant.
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You can use the function _itoa()
here is the prototype:
char *_itoa( int value, char *string, int radix);
make sure you include these header files:
<br />
#include <stdlib.h><br />
#include <stdio.h><br />
Steve
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Yes I've included the libraries and is still not working. Do I have to have a char* variable for example:
char* ch;
ch=itoa(value,string,10);
I think I tried like this too but it's still not working...
Am I doing something wrong???
Mirelutza
Mirelutza
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I've done it! thanks to all...
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I am trying to detect remotly whether a user is currently logged on to a specific machine. The platform is Win NT/2000/XP. Does someone is familier with an API to do this ?
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Hey, can you please help me with this task...
I want to code a replacement list for variables. This list should be stored in a simple text file or in an simple TextArray (e.g.MAP).
e.g.
replacement.txt:
#txtTextVar - pDoc->m_TestVar1
I mean, that all places with #txtTextVar should be replaced with the content of pDoc->m_TestVar1.
How can I do this job?
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Yes, a map is one solution. Implement it.
Kuphryn
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Thanks you for your fast reaction,
but my problem is howto say my prog that "m_TestVar1" is m_TestVar1, you know what I mean? Let me make it clear,
when I have a string like "m_TestVar1" out of a textfile, how can I say my programm that it should replace #m_TestVar1 with the content of "m_TestVar1".
The problem is the assigment between "m_TestVar1" (as a given string) and m_TestVar1 as variable.
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One solution is a map of, say, string key and "variable" value (whatever type you want).
Kuphryn
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I think you misunderstand me.
Let me say it so:
i like to have a funktion with CString parameter.
<br />
int MyNewFunction (CString szVarName)<br />
{<br />
...<br />
return value;<br />
}<br />
szVarName should be the name of the variable. Now the function should return the value of the variable.
e.g.
<br />
m_iTest = 20;<br />
<br />
int iNewTest;<br />
iNewTest = MyNewFunction("m_iTest");<br />
<br />
<br />
Thanx for your help
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Correct. In your example, one solution is a map of CString key and integer value.
Kuphryn
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use some sort of struct that stores the name and the value and then store the struct in a map or array or linked list and then just go through the list with string comparisons and once you find the right one get the value
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Can you give me a small sample please?!
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