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Inside Macintosh: Interapplication Communication /
Chapter 4 - Responding to Apple Events / Reference to Responding to Apple Events
Routines for Responding to Apple Events / Getting the Sizes and Descriptor Types of Descriptor Records


AESizeOfAttribute

You can use the AESizeOfAttribute function to get the size and descriptor type of an Apple event attribute.

FUNCTION AESizeOfAttribute (theAppleEvent: AppleEvent; 
                            theAEKeyword: AEKeyword; 
                            VAR typeCode: DescType; 
                            VAR dataSize: Size): OSErr;
theAppleEvent
The Apple event containing the desired attribute.
theAEKeyword
The keyword that specifies the attribute.
typeCode
The descriptor type of the attribute.
dataSize
The length, in bytes, of the data in the attribute.
RESULT CODES
noErr0No error
errAEDescNotFound-1701Descriptor record was not found
errAENotAEDesc-1704Not a valid descriptor record
errAEReplyNotArrived-1718Reply has not yet arrived

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© Apple Computer, Inc.
7 JUL 1996