We value your feedback.
Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!
Course Of The Month
1 day, 19 hours left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
Fixed Location of DLL
Posted on 2002-03-18
In a lot of programs I have seen where the program keeps all the DLL's in a certain directory and all other programs refference those DLL's from that directory (Not current dir, Not System or System32 dir! i.e. C:\PROGRAM FILES\VENDOR\PROGRAM\MODUL
How do you do this? At work we have our product that uses a couple of DLL's and currently the only way we have found to be sure that all programs have access to the DLL is to put a copy in each directory (I know it's a bad idea! But since my sup refuses to let us tell the clients to install the program on each workstation, instead just install it once and map a shared folder for everyone who uses the program) it's the best option we've found.
If someone has an idea, I'm all ears. BTW, it cannot be absolute path requirements unless you can also provide a way to obtain the absolute directory the program is run from.
Thanks!
-- Dan
How do you do this? At work we have our product that uses a couple of DLL's and currently the only way we have found to be sure that all programs have access to the DLL is to put a copy in each directory (I know it's a bad idea! But since my sup refuses to let us tell the clients to install the program on each workstation, instead just install it once and map a shared folder for everyone who uses the program) it's the best option we've found.
If someone has an idea, I'm all ears. BTW, it cannot be absolute path requirements unless you can also provide a way to obtain the absolute directory the program is run from.
Thanks!
-- Dan
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
-
4
-
2
7 Comments
search relative to your exe
Handle := LoadLibrary(Application.Ex
or add the dll path to the PATH env. variable.
Regards,
Steve
Handle := LoadLibrary(Application.Ex
or add the dll path to the PATH env. variable.
Regards,
Steve
Oh... So then first question is what is handle? (handle := ??), next, is that static or dynamic loading? I'd prefer static loading (i.e. program starts up, and if it's missing a dll it says so and quits). Third. Since you are using a kind of Handle do I need to call procedure/functions like Handle.Foo(a,b,c); or is it just Foo(a,b,c);??
Thanks!
Thanks!
the dynamic loading shown goes to any required directory
static loading
procedure DoSomething; external 'MYLIB.DLL';// dllpath
needs the path in there alrweady..
dynamic loading gives you the chance to set the path..
var
dllpathv: String;
dllHandle: THandle;
MyFunc: function;
// e.g. in create
dllHandle := LoadLibrary(dllpath);
if not (dllHandle = 0)
then @MyFunc := GetProcAddress(dllHandle, 'MydllFunc'); //etc.
// e.g. in destroy
if not (dllHandle = 0)
then FreeLibrary(dllHandle);
Steve
static loading
procedure DoSomething; external 'MYLIB.DLL';// dllpath
needs the path in there alrweady..
dynamic loading gives you the chance to set the path..
var
dllpathv: String;
dllHandle: THandle;
MyFunc: function;
// e.g. in create
dllHandle := LoadLibrary(dllpath);
if not (dllHandle = 0)
then @MyFunc := GetProcAddress(dllHandle, 'MydllFunc'); //etc.
// e.g. in destroy
if not (dllHandle = 0)
then FreeLibrary(dllHandle);
Steve
so for a static load that would place the dll in, say, ..\libs\mylib.dll, calling procedure Foo, it would be like this?
procedure Foo(a,b,c : string) ; External '..\libs\mylib.dll';
This correct?
Thanks!
procedure Foo(a,b,c : string) ; External '..\libs\mylib.dll';
This correct?
Thanks!
Another possibility is to add it to the shared DLL's of the system. It is then found automatically, without the need to link it "hard" in the EXE file.
The following registry key holds the pasths to DLL's:
HKEY_LOCAL_MACHINE\SOFTWAR
The following registry key holds the pasths to DLL's:
HKEY_LOCAL_MACHINE\SOFTWAR
Featured Post
We value your feedback.
Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Objective:
- This article will help user in how to convert their numeric value become words.
How to use
1. You can copy this code in your Unit as function
2. than you can perform your function by type this code
The Code
(CODE)
The Im…
Introduction
I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need.
This article will address some of the concepts when dealing with a multithreaded delphi database…
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar.
Int…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Suggested Courses
Course of the Month1 day, 19 hours left to enroll
Earn Certification
CompTIA IT Fundamentals
$49.00$44.10
717 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.