Importing seperate excel worksheets to new workbook including summary?

Dear All,

I'am Rick van Haaren, 20 years old and new here.
I'm trying to import seperate excel worksheets in a new excel workbook.

What do i want:

I make an analysis in Excel using visual basic. when i save this analysis the computer saves a workbook named: ''turflijst lijn 2 23-06-2013_11-33'' So Date and time are included in this workbooks filename

Every day operators make lots of different analysis in a production environment.
The point is we want a summary of all analysis of the previous day in the morning

I can't get to the code with loads of research to import different excel sheets to one workbook.

Say;

turflijst lijn 2 23-06-2013_11-33''
turflijst lijn 2 23-06-2013_12-24''
turflijst lijn 2 23-06-2013_16-56''

All this workbooks contains 1 worksheet (A33:M33)

How do i import these seperate sheets to one workbook?
The workbook they should be imported to should have a standard worksheet with a Graph and a worksheet with sum of all the seperate analysis.

If anyone could help me i would be very pleased

King regards,

Rick van Haaren
the Netherlands

Ps. Sorry for my bad english