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"Invalid class reference" error executing control panel applet

Posted on 2004-09-25
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Last Modified: 2010-04-16
Started a Control Panel Application in Delphi 7, setting icon, title and description. Created a Form window and set unit1(applet module) to use unit2 (Form). Runs the following code on applet activation:

with TForm2.Create(nil) do
try
  ShowModal
finally
  Free
end;

Installed the applet and launched Control Panel which produces 3 identical application errors:

Exception EAppletException in module Project1.cpl at 00022DD2.
Invalid class reference for TAppletApplication.

Double-clicking the applet icon from control panel produces the error once more before displaying form2 successfully. I don't think I'm trying to do anything special here, so hopefully I am missing something really obvious!

Thanks, J.
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Question by:seizures
2 Comments
 
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Accepted Solution

by:
vadim_ti earned 1000 total points
ID: 12152318
Your Form2 is autocreated in your Project file (DPR)
delete or comment  string

 Application.CreateForm(TForm2, Form2);

in your .DPR file
0
 

Author Comment

by:seizures
ID: 12153948
That did the trick. It was driving me mad so thank you very much.
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