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Put MDI Child forms in DLL

Posted on 2002-06-17
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Last Modified: 2010-04-04
Hi Experts,

I'm working on a large Delphi project that currently has 1 MDI Form and over 50 MDI Childs. The compiled executable is now 4 MB. The program is running on a Citrix server.

What I like to do is to put some part of the program in a DLL, most users will only work with a small part of the program (the data entry). A large part of the program won't be used by all users, and when used it is not that often.

At this moment all users are running the complete executable. Although the MDI Childs are only created when needed and destroyed when they are closed, the users still have to load the complete program into memory. All MDI Childs are in the uses clause of the main form.

I know a DLL can be used to define external procedures. But in my case we're not talking about procedures but about complete (child) forms.

Is there a way to reduce the size of my executable by putting some MDI Childs in a DLL (or somewhere else). I want the user to launch a small application, and the MDI Child must be loaded when needed.

Thanks for any help.

JDN
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Question by:JDN
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Cynna earned 50 total points
ID: 7083484
JDN,

First of all, if your main goal is reducing the size of your exe, then DLL is not the "proper" way to go. Use packages (BPL) instead - that's what they are for. I don't know much about them, but look at this quote from Jeff Overcash (TeamB):

"...The problem is that DLL's have their own Application object that is different than your EXE's.  The simplest way to fix this is to use a BPL instead of a DLL.  BPL's get loaded into the EXE's address space and shares the VCL Globals automatically.  If you must use a dll then pass the Apllication object from your exe to the Dll and assign the Handle of the EXE's Application object to the Handle of the Dll's Application Object.  BPL's are a much cleaner way to do this."


But if you want to use DLL anyway, this is a demo project that does exactly what you want:

http://community.borland.com/homepages/dsp/ftp/d30free/childwnd.zip


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by:CleanupPing
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JDN:
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by:Lukasz Lach
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JDN,
No comment has been added lately (17 days), so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area for this question:

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