| View previous topic :: View next topic |
| Author |
Message |
cnodnarb
Professional Member
Joined: 11 Sep 2002
Posts: 762
Location: Rockeledge, GA
|
 Posted: Tue Mar 18, 2014 2:17 am Post subject: HELP CALLING DLL |
 |
|
I've built a standard DLL by hacking my VB6 linker.
I have no clue how to call it from VDS.
Here's my DLL code LoL
| Code: |
Option Explicit
Public Const DLL_PROCESS_DETACH = 0
Public Const DLL_PROCESS_ATTACH = 1
Public Const DLL_THREAD_ATTACH = 2
Public Const DLL_THREAD_DETACH = 3
Public Function DllMain(hInst As Long, fdwReason As Long, lpvReserved As Long) As Boolean
Select Case fdwReason
Case DLL_PROCESS_DETACH
' No per-process cleanup needed
Case DLL_PROCESS_ATTACH
DllMain = True
Case DLL_THREAD_ATTACH
' No per-thread initialization needed
Case DLL_THREAD_DETACH
' No per-thread cleanup needed
End Select
End Function
Public Function Increment(var As Integer) As Integer
If Not IsNumeric(var) Then Err.Raise 5
Increment = var + 1
End Function
Public Function Decrement(var As Integer) As Integer
If Not IsNumeric(var) Then Err.Raise 5
Decrement = var - 1
End Function
Public Function Square(var As Long) As Long
If Not IsNumeric(var) Then Err.Raise 5
Square = var ^ 2
End Function
|
|
|
| Back to top |
|
 |
cnodnarb
Professional Member
Joined: 11 Sep 2002
Posts: 762
Location: Rockeledge, GA
|
| Posted: Tue Mar 18, 2014 2:22 am Post subject: |
|
|
I don't think it's gonna work with VDS.
"Error: Library function not found at line 4"
| Code: |
loadlib mathlib.dll
%s = ""
%i = @lib(mathlib.dll,Increment,INT:,5,@addr("%s"))
info %s
freelib mathlib.dll
|
|
|
| Back to top |
|
|
cnodnarb
Professional Member
Joined: 11 Sep 2002
Posts: 762
Location: Rockeledge, GA
|
| Posted: Tue Mar 18, 2014 2:44 am Post subject: |
|
|
Alright, I had an error with a .def file for my DLL, it's fixed.
I can call this baby from VB6...
Now time to play with VDS.... |
|
| Back to top |
|
|
cnodnarb
Professional Member
Joined: 11 Sep 2002
Posts: 762
Location: Rockeledge, GA
|
| Posted: Tue Mar 18, 2014 2:46 am Post subject: |
|
|
Need help!
| Code: |
loadlib Project1.dll
%s = ""
%i = @lib(Project1.dll,Increment,INT:,5+5)
info %i
freelib Project1.dll
|
WORKS!! I get a variable returned to i!!!
Is this a memory address or somehow the sum of 5+5?
%i = 285223734
?
Last edited by cnodnarb on Tue Mar 18, 2014 3:03 am; edited 3 times in total |
|
| Back to top |
|
|
cnodnarb
Professional Member
Joined: 11 Sep 2002
Posts: 762
Location: Rockeledge, GA
|
| Posted: Tue Mar 18, 2014 2:56 am Post subject: |
|
|
OK!!
IT IS TOTALLY WORKING!!
Can someone tell me why it starts counting from 285212672 ?
It works though!
Yay!
%i = @lib(Project1.dll,Increment,INT:,1+1) = 285223730
Does this make sense to any of our math wizards/those familiar with DLL's?
Does 285212672 have any significance? |
|
| Back to top |
|
|
cnodnarb
Professional Member
Joined: 11 Sep 2002
Posts: 762
Location: Rockeledge, GA
|
| Posted: Tue Mar 18, 2014 3:03 am Post subject: |
|
|
DANGER WILL ROBINSON - I have found the significance
http://msdn.microsoft.com/en-us/library/aa733541(v=vs.60).aspx
NO DANGER!
Just means my DLL is public.
So why is it counting memory addresses? |
|
| Back to top |
|
|
cnodnarb
Professional Member
Joined: 11 Sep 2002
Posts: 762
Location: Rockeledge, GA
|
| Posted: Tue Mar 18, 2014 3:12 am Post subject: |
|
|
Square works perfectly.
loadlib Project1.dll
%s = 9
%i = @lib(Project1.dll,Square,INT:,@binary(INT,2))
clipboard set,%i
freelib Project1.dll
It is on like Donkey Kong. |
|
| Back to top |
|
|
Garrett
Moderator Team
Joined: 04 Oct 2001
Posts: 2149
Location: A House
|
| Posted: Tue Mar 18, 2014 4:10 am Post subject: |
|
|
Wish I could answer your questions but it looks all geek to me.
_________________
'What you do not want done to yourself, do not do to others.' - Confucius (550 b.c. to 479 b.c.) |
|
| Back to top |
|
|
cnodnarb
Professional Member
Joined: 11 Sep 2002
Posts: 762
Location: Rockeledge, GA
|
| Posted: Tue Mar 18, 2014 12:00 pm Post subject: |
|
|
I think it's because I've failed to properly pass a variable from VDS to my increment function, so it starts counting from the memory address.
When I pass null by mistake it returns memory address. When I was guessing it was hex counting or something, 5+5, I have no ideal what it translated.
Now square roots passed properly... and apparently it was waiting for a 'solid' parameter.
The good news is, I can make VB6 DLL's for VDS now!
[edit]
I am passing the parameter perfectly. It's just a quirk of communicating with the DLL. The function works as programmed, I just have to subtract 285212672 from the returned value.
%i = @lib(Project1.dll,Increment,INT:,@binary(largeint,24))
= 285212697
285212697 - 285212672 = 25
25 = 24 incremented by 1. |
|
| Back to top |
|
|
cnodnarb
Professional Member
Joined: 11 Sep 2002
Posts: 762
Location: Rockeledge, GA
|
| Posted: Tue Mar 18, 2014 1:12 pm Post subject: |
|
|
Alright, learned how to change the base address, which is highly recommended. Good thing this quirk happened! So my first thought of 'DANGER!' was also accurate. Helps to read/review this stuff when you're actually awake.
"The default value is &H11000000 (285,212,672). If you neglect to change this value, your component will conflict with every other in-process component compiled using the default. Staying well away from this address is recommended." |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
@vdsworld