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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

AESizeOfKeyDesc

You can use the AESizeOfKeyDesc function to get the size and descriptor type of a keyword-specified descriptor record in an AE record.

FUNCTION AESizeOfKeyDesc (theAERecord: AERecord; 
                          theAEKeyword: AEKeyword; 
                          VAR typeCode: DescType; 
                          VAR dataSize: Size): OSErr;

theAERecord

The AE record containing the desired keyword-specified descriptor record.

theAEKeyword

The keyword that specifies the desired descriptor record.

typeCode

The descriptor type of the keyword-specified descriptor record.

dataSize

The length, in bytes of the data in the keyword-specified descriptor record.

RESULT CODES

noErr	0	No error
errAEDescNotFound	-1701	Descriptor record was not found
errAENotAEDesc	-1704	Not a valid descriptor record
errAEReplyNotArrived	-1718	Reply has not yet arrived