Oah, I finally got it to work. Was just going to upload the file, when I discovered an error in my programing. (Yes, I did debug several times before) But thank you for the quick reply nonetheless!
I have, however encountered another problem, that is definitely NOT a typing error since the function itself works perfectly.
(I will insert the uploaded file as soon as I get home. I can not upload from this computer. Company firewall stops me! Maybe in the meantime you can help me using this description?)
Everytime I doubleclick in the a record in the subform of the form corresponding yo your "tblAdvancedSearch" of "Search Multiple Fields.mdb", it links to the correct form. But this form is has a subform, which is lists the relevant entries from another table.
I discovered, that doubleclick uses the correct matID to find the record, instead of jumping to the correct record in the main form (as desired), it jumps to the record in the subform. Ususally, this does not make a difference, but if there is no relevant record in the subform, it will just jump to the first record in the list.
How do I resolve this problem?
____EDIT____
I have not yet managed to upload the relevant file, but I noticed that the jump to the correct record works differently, when I use a built button to reference to the same form (although from another form). Here, it will not jump to the first entry, but to a completely new entry form (with default values and no ID assigned in the main form), when there is no corresponding match.