Solved

installing a component

Posted on 2000-03-14
8
148 Views
Last Modified: 2010-04-04
HI
I have a component that is for D2 and I have D4. Its exeicon and it has a exeicon.dcu but it wont compile into D4 for me. Can this be done or am I doing something wrong.
Thanks
0
Comment
Question by:smurff
[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
  • 3
8 Comments
 
LVL 5

Expert Comment

by:TheNeil
ID: 2615707
You cannot necessarily install D2 code into D4. What have you done to try installing it so far?

Try this:
Component->Install Component
Goto the 'Into New Package' tab
Set unit name to your DCU
Enter a package name
Enter a Description
Hit Ok

This will TRY to install the component for you but as I said, your code might not work in Delphi 4 and you might have to go back to the component supplier

The Neil
0
 
LVL 15

Accepted Solution

by:
simonet earned 25 total points
ID: 2615719
Delphi Compiled Units (DCU) are version-specific for the version of Delphi that compiled them.

This means that a DCU compiled with Delphi 2 will ONLY work with Delphi 2. A DCU compiled with Delphi 4.00 will not work with Delphi 4.03. They are very tied to the compiled version and to their dependencies (other DCUs) as well.

Unless you have the source (.PAS) file for the component you are trying to install, the Delphi 2 DCU file is worthless undes Delphi 3/4/5.

Neil's suggestion will not work either, because he's ignored the fact that DCUs are version-specific.

Although there can be differences in the code, you can only overcome such problems by having the source files.

Yours,

Alex
0
 
LVL 3

Author Comment

by:smurff
ID: 2619380
Thanks anyway. Dont supose you know how to change the icon of a compiled EXE file do you? That was what the component did.
Thanks again

0
Industry Leaders: We Want Your Opinion!

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!

 
LVL 5

Expert Comment

by:TheNeil
ID: 2619442
You can change the icon in a rather nasty way: Search through the exe at a byte level searching for the icon (as bytes), then overwrite it with a new byte stream. Amazingly it DOES work but it isn't a pretty solution

The Neil
0
 
LVL 3

Author Comment

by:smurff
ID: 2619774
i thought there might of been an api such as updateresource or something
0
 
LVL 5

Expert Comment

by:TheNeil
ID: 2619863
There is an API call to extract the icon but I don't know of any such call to put an icon back in. That doesn't mean that it doesn't exist but the chances are against it

The Neil
0
 
LVL 3

Author Comment

by:smurff
ID: 2620009
I have the component i just cant install it or get the source. The guys website is no longer available so I cant even ask him for the source.
Anyway thanks for your help

Smurff
0
 
LVL 3

Author Comment

by:smurff
ID: 2620289
I have the component i just cant install it or get the source. The guys website is no longer available so I cant even ask him for the source.
Anyway thanks for your help

Smurff
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

763 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question