Yoshiyuki Hasegawa wrote:

>> '----------------
>> include "Tlbx MacApplication.incl"
>> dim as OSStatus ignore
>> ignore = fn HIAboutBox( 0 )
>> do
>> HandleEvents
>> until ( 0 )
>> '----------------
> When the code above is run, the error below is displayed.
> What is the counter measure?

Tlbx MacApplication.incl is a new header in FB4 Release 3

Perhaps you don't yet have Release 3?  In that case, just declare  
HIAboutBox():
toolbox fn HIAboutBox( CFDictionaryRef inOptions ) = OSStatus // OS X  
10.3

Robert P.