Dymanic load DLL

[ahollaar]

HI all,

I created an apllication and a dll.
Can somebody provide me a simple piece of code, how to load the dll and load a form created in the dll and how to unload the dll after closing the form inside the dll.

Thanks,

AXH

[ahollaar]

Can somebody help me with this ??

[Pirate]

Well , I don't know what is this form you want to load from the dll . Is this dealing with plugins archit. ?

[ahollaar]

Just a normal windows form

[Pirate]

In what lang did you write that dll ?

[ahollaar]

vb.net (class library)

[Pirate]

OK , the general idea of loading a dll is as follow :

First , reference your dll by right clicking on the Reference item in the project explorer . Browse to your dll . Click Select and then OK .

Secondly , import your dll in your form or whatever by typing first the namespace something like this :

Imports MYAPPLICATION.MyClassForm

Thirdly , Instantiate an obj and use the methods inside it as you do with anyother obj in .NET .

Dim MyCls As New MyClassForm
MyCls.Your methods here

I still don't know if this would help you in anyway .

[ahollaar]

Thanks, it's working

By the way,

I will split up my program by using dll's.
Is there a program or a something else to check if the dll is available so I can catch the fault message and write a program to download the specific download.

Thanks again

AXH

[Pirate]

Umm , what do you mean by splitting up your app into dlls ?

[ahollaar]

I will split up my program up in for example query / export /import / maintenance
So I thought I will make four seperate dll's

Not a good idea ? or do you have a other option

AXH

[Pirate]

For me , I wouldn't bother making 4 dlls . You have either these options :
1-Pack your Classes & Functions into one dll .
Or
2-Put them in separate modules , let's say 4 modules if that's possible in your case .

Advantage of the second option :
1-Faster when making updating , corrections , addition , deletion ...etc to the source code .
2-Much more eaiser when deploying your app . No need to look for the dlls , no possiblity of losing your dlls (i.e can't delete these dlls )

[ahollaar]

Why is there no need for looking for dll's
Before I start the program and I will move the dll or rename the dll I will get an exception error!

[Pirate]

Originally posted by ahollaar
Why is there no need for looking for dll's
Before I start the program and I will move the dll or rename the dll I will get an exception error!

Because the file name has been changed either by its name or the location and is no longer accessible from your proj . In this case if you did any of the above operation you have to re-reference the file .

[ahollaar]

And for example a stupid user delete / moved the dll what todo then. The progrma will generate an error

[Pirate]

Yes .