A question was: "I am currently working on a Vaccine trial and I intend using epidata for the study. My problem now is that I have been struggling with how to create a field to load photo ID. I need a help on this."

I suggest in addition to other help also to look at the "execute" command, which is a check file command that allows running external software during entry. From the help file of EpiData entry this example is found under "execute": PICTNUM DEFINE tmpName _________________ AFTER ENTRY LET tmpName="d:\pics\picture"+pictnum+".jpg" EXECUTE @tmpName WAIT END END

The field PICTNUM is a integer field. If user enters the number 3 then a .jpg picture file called "d:\pics\picture3.jpg" will be opened by the default program for .jpg files. EpiData halts until pictureviewer (or –editor) is closed.@tmpName means that @tmpName should be replaced by the contents of the variable tmpName.

Regards Jens Lauritsen EpiData Association