Dear Kambiz,
thank you for the answer. {$I Delphiarea.inc} line is in both of the two files RotImg.pas and RotImgReg.pas. Still I am not able to install component. The error message is fatal error: file not found. I do not understand in your answer where to copy this line.
I am not a professional software programmer.
I have no any idea how to install this component.
Please explain it.
Thank you
kezso