Searching a file in a directory

[Maracay]

Hi Guys,

I have in a table the data for pictures, Ex. PIC17374 this pictures are
located in a folder in the hard drive, I need to check that this pictures
really exist before running a reports, what I am planning to do is create a
command bottom and when is clicked, look in the table for the picture name
and search in the directory if really exist, my question is: how can I look
for the picture in a directory?

I will appreciate any help

Thanks