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Hi All,
I have created one MFC Dialog Based application.now if i am
running the application its working fine,instead of closing
he application i minimized the application,if i run the
application again,i am getting the Dialog.

I want to prevent the calling of application multiple times.
please give me the code and let me know in which method i
need to make changes.

Praveer

Answer Posted / revanth

BOOL CSampleApp::InitInstance()
{
// InitCommonControlsEx() is required on Windows XP
if an application
// manifest specifies use of ComCtl32.dll version 6
or later to enable
// visual styles. Otherwise, any window creation
will fail.
INITCOMMONCONTROLSEX InitCtrls;
InitCtrls.dwSize = sizeof(InitCtrls);
// Set this to include all the common control
classes you want to use
// in your application.
InitCtrls.dwICC = ICC_WIN95_CLASSES;
InitCommonControlsEx(&InitCtrls);

CWinApp::InitInstance();

AfxEnableControlContainer();

// Standard initialization
// If you are not using these features and wish to
reduce the size
// of your final executable, you should remove from
the following
// the specific initialization routines you do not
need
// Change the registry key under which our settings
are stored
// TODO: You should modify this string to be
something appropriate
// such as the name of your company or organization
SetRegistryKey(_T("Local AppWizard-Generated
Applications"));

if(NULL != ::CreateMutex(NULL, TRUE, _T
("CSingleInstanceApp")))
{
long dwError = ::GetLastError();
if(dwError == ERROR_ALREADY_EXISTS)
return false;
}

CSampleDlg dlg;
m_pMainWnd = &dlg;
INT_PTR nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
// TODO: Place code here to handle when the
dialog is
// dismissed with OK
}
else if (nResponse == IDCANCEL)
{
// TODO: Place code here to handle when the
dialog is
// dismissed with Cancel
}

// Since the dialog has been closed, return FALSE
so that we exit the
// application, rather than start the
application's message pump.
return FALSE;
}

Is This Answer Correct ?    6 Yes 2 No



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