MASM to FASM

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clamicun

Joined: 04 Dec 2013
Posts: 77
Location: Muenster NRW Germany

clamicun 29 May 2014, 16:48

I am trying to "translate" a MASM program into FASM.
There are constructs which I definitely do not understand.
Any help -please - to understand this:

What does mean 'addr' (is it like offset ?)

And these constructs:

mov ecx,lParam
mov eax,(NMHDR ptr [ecx]).code
(I know the structure NMHDR is in user32,inc)

mov (TOOLTIPTEXT ptr [ecx]).lpszText,eax

29 May 2014, 16:48

JohnFound

Joined: 16 Jun 2003
Posts: 3499
Location: Bulgaria

JohnFound 29 May 2014, 19:04

Code:

mov  ecx, [lParam]
mov  eax, [ecx+NMHDR.code]
mov  [ecx+TOOLTIPTEXT.lpszText], eax

29 May 2014, 19:04

clamicun

Joined: 04 Dec 2013
Posts: 77
Location: Muenster NRW Germany

clamicun 30 May 2014, 11:07

Dear JohnFound,
thank you very much for the answer.
Could you please give me some further info on what:

xxx.code

actually does mean?

30 May 2014, 11:07

JohnFound

Joined: 16 Jun 2003
Posts: 3499
Location: Bulgaria

JohnFound 30 May 2014, 11:23

clamicun wrote:

Could you please give me some further info on what: xxx.code actually does mean?

Do you mean for example NMHDR.code? It is simply a label, defined by struct macro.
It consists of "main" label "NMHDR" and a "sublabel" (or local label) "code" separated by dot.
The value of this label is actually the offset of the field "code" inside the data structure NMHDR.
Particularly, NMHDR.code = 8; TOOLTIPTEXT.lpszText = 12; ECX points to the start of the data structure.

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30 May 2014, 11:23

clamicun

Joined: 04 Dec 2013
Posts: 77
Location: Muenster NRW Germany

clamicun 30 May 2014, 17:15

Again thank you very much.
I get it now; the MASM file is full of those xxx.code constructions.
Have a good weekend down there at the black sea.

30 May 2014, 17:15

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