I have to creat a program: A dialog have a button (Show). Press Show,
then anther dialog is displayed.
I created the first dialog. Then Insert ->Resource->Dialog->New to
create the second dialog (IDD_SHOWPEN).
After that Insert->New Class and declare all: Class type (MFC), Name
(CShowPen), Base class (CDialog), Dialog ID (IDD_SHOWPEN).
I use ClassWizard to write code for button Show
However I received an error: "CShowPen unclared indentifier"
Where's wrong in my program. Please tell me !