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Index > Windows > DragQueryFile problem

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tangent



Joined: 21 Nov 2007
Posts: 9
tangent
"if ((HWND)lParam==hwnd)" becomes what?.. i noticed that all of the tutorials i've run across use dialogs when dealing with buttons, so i'm a bit stumped as to how to convert that into fasm syntax.. thanks for any help

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Last edited by tangent on 21 Nov 2007, 03:59; edited 1 time in total
Post 21 Nov 2007, 01:35
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
do you mean the typecast? The answer is simply, you DON'T cast.

Code:
mov eax, [hwnd]
cmp eax, [lParam]
jne .skipIfBody    
Post 21 Nov 2007, 01:50
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tangent



Joined: 21 Nov 2007
Posts: 9
tangent
that's the stuff.. i appreciate it

*edit*
okay, now it seems i'm having a problem with DragQueryFile telling me this:
Code:
        invoke DragQueryFile,wparam,0xFFFFFFFF,szdfn,0
macro/proc32.inc [17] invoke [3]:
     pushd arg
error: invalid value.    

from szdfn rb 50.. am i missing something that should be obvious?
Post 21 Nov 2007, 01:55
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
I think you need this:

Quote:
invoke DragQueryFile,[wparam],0xFFFFFFFF,szdfn,0


And, if szdfn is allocated on the stack (variables local to the procedure are), then you have to change "szdfn" to "addr szdfn", that will calculate the offset and pass that pointer to the API. http://flatassembler.net/docs.php?article=win32 explains how addr works at 2.1 Procedure parameters.
Post 21 Nov 2007, 04:31
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tangent



Joined: 21 Nov 2007
Posts: 9
tangent
still getting the same error..
by the way it looks like so now:
local szdfn db 128
invoke DragQueryFile,[wparam],0,addr szdfn,128

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Post 21 Nov 2007, 05:10
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
Try using "local str[128]:BYTE"
Post 21 Nov 2007, 13:48
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tangent



Joined: 21 Nov 2007
Posts: 9
tangent
well, i noticed that even if i remove szdfn from it, same error..
invoke DragQueryFile,[wparam],-1,0,0
macro/proc32.inc [20] invoke [6]:
call [proc] }
error: undefined symbol.
Post 21 Nov 2007, 15:35
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
No, now it is a new error. You have not imported DragQueryFile anywhere.

Can you post the code? I think we never get it work by just reading a single line of code.
Post 21 Nov 2007, 16:10
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coconut



Joined: 02 Apr 2004
Posts: 326
Location: usa
coconut
you can also look in fasmw source for example of this
Post 21 Nov 2007, 20:21
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tangent



Joined: 21 Nov 2007
Posts: 9
tangent
i dont have a copy of the fasmw source.. the prog source is here: http://pastebin.ca/793126
Post 21 Nov 2007, 23:28
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wisepenguin



Joined: 30 Mar 2005
Posts: 129
wisepenguin
hi tangent,

Code:
  library kernel32,'KERNEL32.DLL',\
          user32,'USER32.DLL',\
          shell32, "shell32.dll"

  include 'api\kernel32.inc'
  include 'api\user32.inc'
  include "api\shell32.inc" 
    


works for me using fasm 1.67.23 (latest as of now)
Post 21 Nov 2007, 23:35
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tangent



Joined: 21 Nov 2007
Posts: 9
tangent
well, damn. i appreciate it
Post 21 Nov 2007, 23:44
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coconut



Joined: 02 Apr 2004
Posts: 326
Location: usa
coconut
the source is included with the fasm packages
Post 26 Nov 2007, 16:16
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