Gerhard,

g> i did but without success.

I should have read your first post with more attention: actually it
was quite clear you did.
It looks like the support for int64 in the database VCL is somehow
lacking, or at least it's not done the same way it's done for other
types.

Anyway, using Value should get you going:

dsGetFolderItems->FieldByName("FOLDER_ID")->Value

If you use persistent fields you can access AsLargeInt directly:

dsGetFolderItemsFOLDER_ID->AsLargeInt

HTH
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