Powerpoint: Import Cell Value from Excel

[4Ferdinand]

Hello everyone, it's my first post so nice to meet you.


So here goes the question:
Assume i have C:\book1.xls file; and textbox1 & commandbutton1 in powerpoint slide 1.

How to change the text in textbox1 (in powerpoint) to match the value of A1 Cell in book1.xls when i click commandbutton1?

Private Sub commandbutton1_Click()
textbox1.text = (????).workbooks("C:\book1.xls").Worksheets("Sheets1").Range("A1").formular1c1
end sub

Thanks for your help.