The perl code is as below :

package ExcelFileIsProtected;
 
sub ExcelFileIsProtected
{
    my ($path_to_file) = @_;       # One argument wait
    use Win32::OLE;
 
    my $xlApp = Win32::OLE->new('Excel.Application');
      
    $xlApp->{DisplayAlerts} = 0;
       
    # Open excel file.
    my $xlBook = $xlApp->Workbooks->Open($path_to_file);
    my $Sheet1 = $xlBook->Worksheets(1);
        
    my $row = 1;
    my $col = 1;
 
    $Sheet1->Cells($row,$col)->{'Value'} = 5;
 
    if (Win32::OLE->LastError) 
    {
       return true;
    }
    else    
    {
      return false;
    } 
 
 
    $xlBook ->Close();
 
    undef $xlBook;
} 
 
1;
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