CStdioFile can't be use while the app is automatic open after turning on of computer

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VS2013

Hi, all!
I find a question about the CStdioFile & "Run".
I registered my application to "Run" which allowed the application implemented automatically after turning on the computer.
It works till I added the file read/write through the CStdioFile class...
My application cannot implement automatically when I turn on computer, but the register is still exist inside the "run" table:(

my snippet code:

C++

BOOL CShutdownTurnOnEventDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	SetIcon(m_hIcon, TRUE);			
	SetIcon(m_hIcon, FALSE);		

	// TODO:  My code
    //register the computer to "Run"(If anyone interested, I can provide it:))
	AutoRunApp(true); 

	//Write file
	CStdioFile file;
	file.Open(_T("ActionLog.txt"), CFile::modeCreate | CFile::modeNoTruncate | CFile::modeWrite);
	file.WriteString(_T("Computer Turn On\n"));
	file.Close();

	return TRUE;
}

Would anyone provides some suggestion?

Appreciated!!

Posted 17-Nov-15 21:32pm

Member 10307999

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Comments

Richard MacCutchan 18-Nov-15 4:21am

Most likely you do not have access to the startup directory for this application when automatically started. You should use a fixed location that allows you to create files.

Member 10307999 18-Nov-15 23:02pm

MacCutchan, Thanks for your reply and it give me a inspiration! Finally, I set the path of the ActionLog.txt to C:\ProgramData and it works!! Thank you again!!

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Member 10307999 · Answer 1 · 2015-11-18T17:03:00

Solution 1

MacCutchan, Thanks for your reply and it give me a inspiration! Finally, I set the path of the ActionLog.txt to C:\ProgramData and it works!! Thank you again!!

Posted 18-Nov-15 17:03pm

Member 10307999

Comments

Dave Kreskowiak 18-Nov-15 23:20pm

Running your application out of the Run key in the Registry does not start your application on startup. It starts your application when a user logs into the console. The application is then executed as the person who logged in.

Normal users cannot write files to certain locations in the directory structure, such as anything under Program Files or the root of the drives. The ProgramData folder is a "public" folder that allows users to write stuff that all users on the machine can access. That's why your app suddenly works when you changed the filepath to something under ProgramData.

Member 10307999 19-Nov-15 1:49am

Thank you, Kreskowiak! Your explanation let me understand more clearer!!