Monster Drop Rates and Names

Questions

DropKind(IK3_SWD, 6, 6);
DropItem(II_GEN_GEM_GEM_FURIOUSMATCH, 200000000, 0, 1);

1. What is DropKind?
2. What is (IK3_SWD, 6,6); and where do I find it?
3. What is DropItem?
4. Where do I get II_GEN_GEM_GEM_FURIOUSMATCH?
5. I tried to find an item in propitem.txt for the code for an item (ex. IDS_PROPITEM_TXT_000018) but it doesnt say the format in the way in number 4 mentioned above

Badly need your help guysss

1. DropKind is, Drop the Items with the IK3_SWD in the item Level Area "from 6, to 6"
2. IK3_SWD is the IK3_ID to find in defineItemkind.h and in front of every Item in the Propitem.txt/Specitem.txt - 6,6 is the Item Level Area to find in the propitem.txt/Specitem.txt
3. DropItem is, Drop this specific Item "II_GEN_GEM_GEM_FURIOUSMATCH" with this chance 200000000/3.000.000.000 <- 100% (0) i don't know currently but has to be there, in this amount (1)
4. You find it in your Propitem.txt/Specitem.txt if you search for it STRG+F or out of the DefineItem.h
5. Because this "IDS_PROPITEM_TXT_000018" is just the Name you find also in the Propitem.txt.txt but you need the Define -> look at 4.

A tipp: just use DropItem for every item you add in PropDropitem and PropmoverEx

Thank you!

The one that I'm looking by the way is the spec_item.txt

But anyway thanks so much!