DLL's

BackupUser · Post by **BackupUser** » Thu Feb 07, 2002 2:11 am

Restored from previous forum. Originally posted by Paul.

Maybe someone out there can help me??
I need to access functions in a DLL. I have tried Mr.Skunks library but it either doesn't work properly/doesn't return the proper data, or it crashes the EXE.

I went to the Windows API and can load the DLL using LoadLibrary() and can even get the address of the various commands inside the DLL using GetProcAddress() but after that I hit a brick wall... I can't seem to find any commands or reference to commands that actually send/receive arguments to the DLL.

Can anyone point me in the right direction??

BackupUser · Post by **BackupUser** » Thu Feb 07, 2002 3:19 am

Restored from previous forum. Originally posted by El_Choni.

I havent tested this:

Code: Select all

If LoadLibrary_("MySystemLib.dll")
 arg1.l = 1
 arg2.l = 2
 arg3.l = 3
 result.l = 0
 FunctionPointer = GetProcAddress_(whatever goes here... )
 ! push dword [v_arg1]
 ! push dword [v_arg2]
 ! push dword [v_arg3] ; or maybe in reverse order, I don't remember
 call FunctionPointer
 ! mov [v_result], eax
EndIf

Hope it works. Bye,

El_Choni

Edited by - El_Choni on 07 February 2002 03:19:55

BackupUser · Post by **BackupUser** » Thu Feb 07, 2002 4:23 am

Restored from previous forum. Originally posted by Paul.

Seems to be a "No Go" here.
Causes an EXE crash when trying to run or compile

BackupUser · Post by **BackupUser** » Thu Feb 07, 2002 12:13 pm

Restored from previous forum. Originally posted by El_Choni.

This works, with inline asm enabled:

Code: Select all

module = LoadLibrary_("USER32.DLL")
If module
  result = 0
  MessageBox = GetProcAddress_(module, "MessageBoxA")
  If MessageBox
    Caption.s = "MessageBox function"
    Message.s = "Working"
    push dword 0
    push Caption
    push Message
    push dword 0 ; the order seems correct
    call MessageBox
    mov result, eax
  EndIf
EndIf

Bye,

El_Choni

Edited by - El_Choni on 07 February 2002 12:19:46

BackupUser · Post by **BackupUser** » Thu Feb 07, 2002 2:26 pm

Restored from previous forum. Originally posted by Paul.

The call I have to make looks like this:
Error.l=BoxReady(LPT1.l,Type.l)

Value going in is LPT.l=1
Return values are Error and Type
So I need something that will return 2 values.

If I try to modify your code I get either EXE has generated errors or Assembly error, mail Fred

BackupUser · Post by **BackupUser** » Thu Feb 07, 2002 2:57 pm

Restored from previous forum. Originally posted by El_Choni.

If Type is a return value, then you should probably pass its pointer instead of its value.

Code: Select all

module = LoadLibrary_("YourLib.DLL")
If module
  result = 0
  BoxReady = GetProcAddress_(module, "BoxReady")
  If MessageBox
    LPT1.l = whatever
    Type.l
    varptr.l = @Type
    push LPT1
    push varptr ; the order seems correct
    call BoxReady
    mov Error, eax ; Type is already updated
  EndIf
EndIf

Try it. Anyway, I don't know if LoadLibrary can load any library or only registered libraries or only libraries present in the System folder, you may know that.

Bye,

El_Choni

Edited by - El_Choni on 07 February 2002 14:58:15

BackupUser · Post by **BackupUser** » Thu Feb 07, 2002 3:23 pm

Restored from previous forum. Originally posted by Paul.

WooHoooo !!!
That's for the help El_Choni.
At first this wouldn't work either but out of desperation a switched around the PUSH to:
push varptr
push LPT1

Guess it does things in reverse. Anyways, thank you for solving my problem!!

BackupUser · Post by **BackupUser** » Sat Feb 09, 2002 11:08 am

Restored from previous forum. Originally posted by gnozal.

Yes, WooHoooo for El_Choni !!!
But I'd like some REAL DLL support in PureBasic instead of using ASM !
Please Fred...

BackupUser · Post by **BackupUser** » Sat Feb 09, 2002 12:28 pm

Restored from previous forum. Originally posted by fred.

WIll be in the next release. Don't worry

Fred - AlphaSND

BackupUser · Post by **BackupUser** » Sat Feb 09, 2002 3:33 pm

Restored from previous forum. Originally posted by michaelj.

WIll be in the next release. Don't worry

Now, if that would include ActiveX DLLs, that would be world-changing !!

;o)

Michael.
(Registered PureBasic user)

BackupUser · Post by **BackupUser** » Thu Apr 11, 2002 3:42 am

Restored from previous forum. Originally posted by Shawn.

WIll be in the next release. Don't worry

Fred - AlphaSND

Hi.

Did the DLL support get pushed back to a later release, or did I miss it in the documentation?

Thanks.

Shawn

BackupUser · Post by **BackupUser** » Thu Apr 11, 2002 3:49 am

Restored from previous forum. Originally posted by Shawn.

WIll be in the next release. Don't worry

Fred - AlphaSND

Hi.

Did the DLL support get pushed back to a later release, or did I miss it in the documentation?

Thanks.

Shawn

I did miss it in the documentation. See "Library" in the reference section. It is not yet listed on the main page.

Thanks.

Shawn

BackupUser · Post by **BackupUser** » Thu Apr 11, 2002 7:33 am

Restored from previous forum. Originally posted by Rings.

Its defintly in the V3.0 version.

Its a long way to the top if you wanna .....CodeGuru