Failed to use Skins in a DLL form

Thank you for the sample, Alexander. It was very helpful. To resolve the problem, you must initialize GDI+ in your DLL. Here is the corrected code:

Delphi
Unit2.pas  

uses  
  dxGDIPlusAPI;  

{$R *.dfm}  

procedure ShowForm(Handle: THandle); export; stdcall;  
begin  
  Application.Handle := Handle;  
  Form2 := TForm2.Create(Application);  
  try  
    Form2.ShowModal;  
  finally  
    Form2.Free;  
  end;  
end;  

initialization  
  dxInitializeGDIPlus;  

finalization  
  dxFinalizeGDIPlus;  

In the meantime, I recommend that you follow the instructions described in the following Knowledge Base article:
 "How to avoid the "A class named AClassName already exists" error when using DLLs in your applications"
 Article ID: A1994 (http://www.devexpress.com/kb=A1994)
The main idea is that you should compile both the main module of your application and all the loaded DLLs with the runtime packages of our components. This will prevent possible errors and in addition, you will be able to use our controllers through the entire application and its dynamic modules. I.e. you can put a SkinController only on the main module of your application.
Feel free to contact us if you need any further assistance on this item.
Thanks,
Serge