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Mark Salsbery wrote: There are special folders available - per user and common, for
storing application runtime data.
Yeah, I already attempted to tell him that.
led mike
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Mark, again thanks. I'll look up the SHFileOperation() and see. the reason I need to place the root tree at "c:\\" is because my program only knows that location and it contains the complete database for the program. I tried to change the paths to Program Files\\WellDB and placed the root tree there, but the operating system wouldn't let me write to the database saying Access Denied.
I suppose I could just write a function to re-create those database directories in the root tree after the program is installed. A little sloopy, but it would work! Can you think of a better way? I have to have the databases at "c:\\"?
A C++ programming language novice, but striving to learn
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You'll have the same problem writing to the root.
Larry Mills Sr wrote: the reason I need to place the root tree at "c:\\" is because my program only knows that location
That's why the proper method is to use the known system folders, which vary by OS.
There's API's to get these folders. The installer should create subfolders with
the appropriate permissions and that's where your app should write app data.
Installers should know about these folders just like they know about the Program Files folder.
For example, on Vista you can use SHGetKnownFolderPath() to get the following paths at runtime:
FOLDERID_RoamingAppData - per user roaming application data
FOLDERID_LocalAppData - per user local application data
FOLDERID_ProgramData - common application data
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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While I was waiting for some answers I did this. Remember you showed me about this:
if(!myFile.Open(m_csFileName, CFile::modeNoTruncate | CFile::modeCreate | CFile::modeReadWrite | CFile::shareDenyWrite | CFile::typeText, &ex))
{
TCHAR szError[1024];
ex.GetErrorMessage(szError, 1024);
AfxMessageBox(szError, MB_OK, 0);
return;
}
I have a function that creates all the directories the program uses called SetDir(); I did this:
======================================================================================================================================
CString s;
if(!myFile.Open(m_csFileName, CFile::modeNoTruncate | CFile::modeCreate | CFile::modeReadWrite | CFile::shareDenyWrite | CFile::typeText, &ex))
{
TCHAR szError[1024];
ex.GetErrorMessage(szError, 1024);
//AfxMessageBox(szError, MB_OK, 0);
// I know I'll get the PATH_NOT_FOUND error
SetDir();
s = _T("Done");
FileSaveDir(s); // s will be written to the already known filename
return;
}
=====================================================================================================================================
It creates all the directories and also creates the file. I placed this in The programs application function InitInstance() right after the call for ShowWindow(). everything works fine. Your approach is probally best, but I don't know what all that stuff is. I'll find out though!
A C++ programming language novice, but striving to learn
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led mike wrote: Windows implements special folders like "Documents and Settings" where each user can have their files maintained. That is only one of many solutions that might be appropriate if this is a desktop application which we don't know. These special folders can be accessed and used by applications using the Windows Shell API.
I don't see anywhere in my reply where I said you can use Shell API to write to the root folder of the C drive, do you?
led mike
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okay working with a dialog app. I have a little worker thread doing stuff and then I want to update the dialog. So here is what I am doing...
#define UWM_UPDATEGRAPH (WM_APP + 1)
//{{AFX_MSG_MAP(CVC_ExampleDlg)
...
ON_MESSAGE(UWM_UPDATEGRAPH, OnUpdateGraph)
...
//}}AFX_MSG_MAP
// I ignore both params
LRESULT CVC_ExampleDlg::OnUpdateGraph(WPARAM, LPARAM)
{...}
now to post this message I thought I wanted to write
PostMessage(UWM_UPDATEGRAPH, 0, 0);
however it is asking for an additional parameter of the HWND.
So here is my question, did I define my message wrong or do how is the best way to get the HWND
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The first argument to PostMessage should be the handle of the window to which you want to post the message. You can retrieve it from the CDialog by calling GetSafeHwnd() on it.
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Cedric Moonen wrote: The first argument to PostMessage should be the handle of the window to which you want to post the message. You can retrieve it from the CDialog by calling GetSafeHwnd() on it.
CDialog is derived from CWnd which has a PostMessage method with the following signature:
BOOL CWnd::PostMessage(UINT message, WPARAM wParam, LPARAM lParam)
Depending on the specifics calling Win32's ::PostMessage function may not be the best way to go about things.
Steve
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Stephen Hewitt wrote: Depending on the specifics calling Win32's ::PostMessage function may not be the best way to go about things.
What do you mean ? If the thread runs outside the dialog class, you have to use ::PostMessage to deliver the message to the correct window. I don't see what you mean in fact, could you elaborate ?
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He’s using MFC and wants to post a message to a CDialog derived class. If the worker thread has access to this class then he can use CDialog::PostMessage. An example:
CDialog theDialog;
void CalledFromOtherThread()
{
theDialog.PostMessage(WM_APP, 0, 0);
}
Steve
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PostMessage function [^] takes four parameters, indeed.
I.e. did you realize the thread procedure is NOT a method (a instance one) of your dialog class?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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If you're starting your thread from within the dialog you want to update, pass the hwnd of the dialog as the LPARAM if you use MFC (AfxBeginThread) - then you can use that in your PostMessage. If you don't use MFC, you can pass it as arglist or lpParmeter depending on how you start your thread.
You can use GetSafeHwnd() in your dialog to get the hWnd to pass.
Inside the thread, cast that parameter to an hWnd and you've got it.
Hope that helps.
Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193
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you can also you the application object memeber variable m_hWnd!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You/xml>
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I'm searching a 2d array with this all I get is not found any help please
#include <stdio.h>
void main( )
{
int x,
y;
int iTwoD[ 3 ][ 3 ]={ { 1,2,3 } , { 4,5,6 } , { 7,8,9 }} ;
int iFoundAt[2]={0,0};
int iValue = 0;
int iFound = 0;
printf( "\nEnter a search value: " );
scanf( "&d", &iValue );
for( x = 0; x <= 2; x++ )
{
for( y = 0; y <= 2; y++ )
{
if( iTwoD[ x ][ y ] = iValue )
{
iFound = 1;
iFoundAt[ 0 ] = x;
iFoundAt[ 1 ] = y;
break;
}
}
}
if( iFound == 1 )
printf( "\nFound value in iTwoD[%d][%d]\n", iFoundAt[ 0 ], iFoundAt[ 1 ] );
else
printf( "\nsearch value not found\n" );
}
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gordon3056 wrote: scanf( "&d", &iValue );
this line is faulty; did you inspect the value of iValue?
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thanks very much bin looking at this for 6 days I might be able to finish the book now
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gordon3056 wrote: scanf( "&d", &iValue );
Should be
scanf( "%d", &iValue );
The debugger is your friend!
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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Mark Salsbery wrote: The debugger is your friend!
and CodeReview by CodeProject is your pal!
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Luc Pattyn wrote: and CodeReview by CodeProject is your pal!
What is this "CodeReview"??
Mark Salsbery
Microsoft MVP - Visual C++
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Mark Salsbery wrote: What is this "CodeReview"??
That is a conspiracy of some 5 million people, where in turn one finds the erroneous line,
and another one indicates the exact column of the mistake. 
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Mark Salsbery
Microsoft MVP - Visual C++
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thanks very much
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I think you also want the equality operator here:
if( iTwoD[ x ][ y ] == iValue )
Hope that helps.
Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193
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gordon3056 wrote: if( iTwoD[ x ][ y ] = iValue )
should be (== NOT = ):
if( iTwoD[ x ][ y ] == iValue )
This signature was proudly tested on animals.
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Good eyes guys - I didn't see that one
Mark Salsbery
Microsoft MVP - Visual C++
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