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Xanfa



Joined: 03 Aug 2006
Posts: 29
Xanfa
Hi everybody, i'm a newbie in assembler in windows, and have a little problem .
Anyone know something like this in Masm32:

assume edx: PTR MOUSEHOOKSTRUCT
invoke WindowFromPoint,[edx].pt.x,[edx].pt.y

How does it look in Fasm ?
I think I can code:

invoke WindowFromPoint,[edx],[edx+4]

but it isn't nice, is it ?

Please help, Thankx alot !
Post 03 Aug 2006, 02:16
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Xanfa



Joined: 03 Aug 2006
Posts: 29
Xanfa
Hmm! I've just read about an undocumented macro, "assume" !
And maybe it's what i'm expect.
But I still need all your idea, thanks !
Post 03 Aug 2006, 02:49
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farrier



Joined: 26 Aug 2004
Posts: 274
Location: North Central Mississippi
farrier
Xanfa,

Tomasz Grysztar posted these suggestions:

After loading the address of your structure into ebx,

Quote:
virtual at ebx
SomeAtEbx SomeStruct ; define instance at EBX address
end virtual

and then:
Code:
mov eax,[SomeAtEbx.Var2] ; assembles to mov eax,[ebx+4]


If you prefer to have the offsets only, you can do it like:
Code:
virtual at 0
SomeStruct SomeStruct ; define instance with the same name
end virtual

and then:
Code:
mov eax,[ebx+SomeStruct.Var2]

(this is what "struct" macro does internally). Choose the one you like more.


In your example you used edx, you would change the above references to ebx to edx!

hth,

farrier

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Post 03 Aug 2006, 04:07
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Reverend



Joined: 24 Aug 2004
Posts: 408
Location: Poland
Reverend
The 'struct' macro by default sets all constants. You reference them via [...+NAME_OF_STRUCTURE.StructureMember] eg.:
Code:
invoke WindowFromPoint,[edx + POINT.x],[edx + POINT.y]    
Post 03 Aug 2006, 22:38
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Xanfa



Joined: 03 Aug 2006
Posts: 29
Xanfa
Oh, your way is simple, and all is done from Tomasz tutorial about win32 headers !
I've already read about struct macro, but I'm so stupid to missed it !

farrier and Reverend - Thanks alot !
Post 04 Aug 2006, 01:37
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