C / C++ / MFC

class CMyDlg 
{
...
CButton* m_pButton;
};

BOOL CMyDlg::OnInitDialog()
{
...
CRect rtWnd(10,10,210,32);
m_pButton = new CButton();
m_pButton->Create(_T("Test"), BS_PUSHBUTTON | WS_VISIBLE, rtWnd, this, 1000);
return TRUE;
}

class CMyDlg 
{
...
CButton* m_pButton;
afx_msg void OnButtonClicked(UINT uiDlgCtrlId);
};

BEGIN_MESSAGE_MAP
...
ON_CONTROL_RANGE(BN_CLICKED,1000,1099,&CWndScriptDlg::OnButtonClicked)
END_MESSAGE_MAP()

void CWndScriptDlg::OnButtonClicked(UINT uiDlgCtrlId)
{
  AfxMessageBox(_T("Hello"));
}

class CMyDlg 
{
...
CButton* m_pButton;
CEdit* m_pEdit;
afx_msg void OnButtonClicked(UINT uiDlgCtrlId);
};

BOOL CMyDlg::OnInitDialog()
{
...
CRect rtWnd(10,10,210,32);
m_pButton = new CButton();
m_pButton->Create(_T("Test"), BS_PUSHBUTTON | WS_VISIBLE, rtWnd, this, 1000);
// new location
rtWnd =  CRect(10,110,210,130);
m_pEdit = new CEdit();
m_pEdit->Create(WS_BORDER | WS_VISIBLE, rtWnd, this, 1101);
// let the window have the same font as the dialog
m_pEdit->SetFont(GetFont());
return TRUE;
}

void CWndScriptDlg::OnButtonClicked(UINT uiDlgCtrlId)
{
// variable to store the data in
int iValue = 0;

// create a CDataExchange object
// UpdateData();

CDataExchange dx(this, true);
DDX_Text(&dx, m_pEdit->GetDlgCtrlID(), iValue);

iValue += 2;

// putthe data back to the dialog
// UpdateData(FALSE);
dx.m_bSaveAndValidate = false;
DDX_Text(&dx, m_pEdit->GetDlgCtrlID(), iValue);
}

LPTSTR pszFileText;//this is the buffer

//....Then somewhere else where you are reading in the file content

DWORD dwFileSize;

//reading the file size
dwFileSize = ::GetFileSize(hFile, NULL);

if(dwFileSize != INVALID_FILE_SIZE)
{
   LPTSTR pszFileText;

   //Take note you are allocating memory here
   HGLOBAL hGlobal = ::GlobalAlloc(GPTR, dwFileSize + 1);

   //lock memory
   pszFileText = (LPTSTR)::GlobalLock(hGlobal);
   if(pszFileText != NULL)
   {
      DWORD dwRead;
      if(::ReadFile(hFile, pszFileText, dwFileSize, &dwRead, NULL))
        ;
      //... rest of the code
   }
   //... if you don't need the contents of the file any more do this

   //open the lock :)
   ::GlobalUnlock(hGlobal);

   //free memory allocated
   ::GlobalFree(hGlobal);
}

Jesus Loves You and Me

char* buffer;

int fileSize = WhateverToGetFileSize();

buffer = new char[fileSize];

DoStuffWithBuffer(buffer);

delete[] buffer;

Tonichka wrote:

The background application does the data acquisition, and plots each data point, also stores the data in a file.

The design is: measure, plot, measure, plot...
Every time clear and redraw with the new point.
GDI+ is used for plotting

The 3rd application is started from the user.
Just the measuring application shouldn’t be dominant and should allow other applications to run.

Tonichka wrote:

The problem is that, 3rd application can not start. The Windows freezes till the measuring is ended.