From Xojo Documentation
Revision as of 22:09, 11 January 2012 by Dbrandt
Property (As Double )
| This property is only available on the macOS platform.
For cross-platform compatibility, use ＃If...＃Endif with the Target... specifiers to make sure you will not attempt to use this property on an incompatible platform.
A Double being passed as a parameter in the AppleEventRecord.