Question

Can't find dll

Asked by: jofftee

I have a small program which uses a 3rd party tool called Virtual Print Engine 3.2.
The program calculates a few complicated maths formuli and prints them using the VPE tool. It works fine on my computer (WIN2K) but when I distribute the program on others in the LAN (both WIN2K + WIN NT) it says it can't find the VPE dll file.
The dll file is copied into the win\system directory of the target computer. If I copy the dll into the application directory it works fine. In VPE documentation there is nothing about registering the dll, just that it should be in the system dir. (or application directory). I have also tried placing it in the system32 directory, which doesn't help.
(Sorry if this is more of a windows question than Delphi!).
Any help greatly appreciated.

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Asked On
2003-05-23 at 06:28:20ID20624425
Tags

dll

Topic

Delphi Programming

Participating Experts
5
Points
150
Comments
7

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Answers

 

by: DaFoxPosted on 2003-05-23 at 08:46:46ID: 8572871

Hi jofftee!

1. Add .dll extension to your import name (if you didn't already do this)
2. Does the DLL itself use other DLLs that are not available? (dependencies)

Markus

 

by: asymmetricPosted on 2003-05-23 at 15:55:58ID: 8575287

I'd say put it in the application directory anyway.  One programmer to another, and one rather annoyed user of other peoples programs to a developer:  I hate that installers are even _allowed_ to put things into my system/system32 directories.  That is the very _cause_ of "DLL hell."

I am much more a fan of every program being entirely self contained, and not putting anything in any directories outside of it's own unless I tell it otherwise.  Yes it may be somewhat wasteful to have copies of the same DLL all over the place, but these days space is cheap.  Recovering from screwy DLL version mismatches isn't nearly as cheap.

 

by: new_xPosted on 2003-05-23 at 23:55:43ID: 8576456


High first of all, as Dafox said you must check the dependecies for that dll, it may use some other dlls. If this is the case you must copy these other Dlls into the system32 folder.  To check dependency you can use tdump.exe which is under the bin directory of Delphi. simply call it in the dos prompt
   tdump c:\..\..\vpe.dll > c:\depends.txt

then open depends.txt and search for import section. Under import section other dll s used by vpe.dll are listed.

or simply copy all the other dlls that exist under application directory into your system32 folder.

Regards,

 

by: joffteePosted on 2003-05-26 at 01:45:24ID: 8583198

Tend to agree in part with asymmetric's comments.
However, I have checked the dll and it has no dependencies over the usual (kernel32, user32 etc.).
There was however a line at the bottom of the imports section which was called 'Delayed Load Import Table'. This named a VPE dll used for pdf export. My program doesn't use pdf at all. Is this a dll which is necessary anyway?
Concerning DaFox's comments, where exactly should the dll extension be added (ie what is an import name).

 

by: CleanupPingPosted on 2003-09-08 at 22:02:23ID: 9315588

jofftee:
This old question needs to be finalized -- accept an answer, split points, or get a refund.  For information on your options, please click here-> http:/help/closing.jsp#1
EXPERTS:
Post your closing recommendations!  No comment means you don't care.

 

by: DragonSlayerPosted on 2004-03-04 at 18:57:57ID: 10519612

jofftee,
No comment has been added lately (179 days), so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area for this question:

RECOMMENDATION: Award points to asymmetric http:#8575287
Please leave any comments here within 4 days.

-- Please DO NOT accept this comment as an answer ! --

Thanks,

DragonSlayer
EE Cleanup Volunteer

20120131-EE-VQP-002

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