Does anyone have an idea how to use fasm.dll with Delphi 2010, or even sample code.

I tried but did not get far.

no one has an idea ha, well I am trying to actually use fasm.dll as a small ASM interpreter where I pass 4 variables, do stuff in asm and then return the variables again. any idea if that would be possible, or shall I start looking for something else.

Probably you have to declare functions as external in Delphi. Actually I simply can't remember what was the proper format....

I know how to load the dll, I know how to find the functions. what I dont know is how to declare the structs of asm in delphi.

For what structs you are talking about? Generally in Delphi, data structures are declared with "type" and "var".
Also there are dynamic data allocation procedures (New, GetMem or both. ) and also you could use API calls to allocate some memory.

Isn't it better to describe what exactly you done and what exactly the problem is. Posting of your code would be very helpful.
Now it looks like: "Help I am drowning!"

1. I am loading the dll with API Call LoadLibrary - no problem
2. I have declared a proc var which corresponds to fasm_Assemble

This is where I am stuck.

The lpMemory should be a pointer to the memory block and cbMemorySize
should contain its size. In the beginning of this memory block the
FASM_STATE structure will reside (as defined in FASM.ASH). The assembler
doesn't allocate any memory beside this block, if it is not enough for
its purposes, the function returns with FASM_OUT_OF_MEMORY state.

1. how do I type FASM_STATE structure and put it into the beginning of the memory?
2. How do I read it after the execution
3. How do I pass vars

Well, FASM_STATE is very simply. I believe you have to define it with:
type TFasmState record condition: cardinal; and so on.... as in Delphi (Pascal) manual.
Then you have to allocate some memory (read the Delphi/VCL manual for functions); then to assign the pointer to the pointer of type (I believe) var MyFasmState: ^TFasmState; and to use MyFasmState^ variable.
Really, I have an impression you don't speak Delphi very well. Why not to make the task fully in assembly?

Mhm, I will dig some more into delphi manuals, I am trying to create a fasm scripting tool for inline assembly coding.

Perhaps its a bit too late, but this site has greate staff about using the winApi in delphi.

http://www.angelfire.com/hi5/delphizeus/

here you can finde the data types equivalents:
http://www.angelfire.com/hi5/delphizeus/lifts.html

the demo not hDisplayPipe
fasm_Assemble(lpSource,lpMemory,cbMemorySize,nPassesLimit,hDisplayPipe)

how to use hDisplayPipe