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Creating and Destroying DataModules


eelias
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Hi there!

 

I am not sure if I am doing right with datamodules.

 

I am following the demos and implemented the folloging in my code:

 

function DMMainG: TDMMainG;
begin
  Result := TDMMainG(UniMainModule.GetModuleInstance(TDMMainG));
end;

So, I add my unit with the datamodule and then i use the above function to get the valid instance of the it.

 

However I am lost, WHAT IS THE REASON of doing this way?

 

On the destructor of my Form I am not not doing FREE on the datamodule. Because if I do so, the next time it is instantiated it do not works correctly: I use DBISAM and the Database and Session components does not get created and the datamodule fails.

 

Then I am writing the application always never doing FREE on the datamodule, and always calling that GetModuleInstace. 

 

I would like to know what is this way, is that is correct, because I am getting some instabilities on the application and I am not sure if this is the reason.

 

Thank you !!!

 

Eduardo

 

 

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