C / C++ / MFC

#include < windows.h >
#include < tchar.h >
#include < stdio.h >

<font color=green>#define SIZE 80</font>

int test;
UINT retval;
LPCTSTR chTest;

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
	char ascii;
	char ascTemp[SIZE];
	ascii = 'A';
	while (ascii <= 'Z') {
		<font color=green>test = _snprintf(ascTemp,SIZE,"%c:\\",ascii);  </font>
        if (GetDriveType(ascTemp)== DRIVE_CDROM)
        {
			<font color=green>_snprintf(ascTemp,SIZE,"Found CDROM %c:\\",ascii);</font>
			test = MessageBoxEx(NULL, ascTemp, "CDROM Drive", MB_OK, 0);
		}
		++ascii;
	}
    return 0;
} 

class CMyDialog 
{
....

BOOL bClose;
}

CMyDialog::InitDialog() 
{
....
// initialize close to be false
bClose=FALSE;
....
}


CMyDialog::OnClose()
{
  if (bClose)
  {
     CDialog::OnClose();
  } else
  {
     // do your stuff

  }
}