GetControlPropertySize2

PATHMac OS 8 and 9 Developer Documentation > Human Interface Toolbox > Control Manager >

Programming With the Mac OS 8.5 Control Manager

GetControlPropertySize

Obtains the size of a piece of data that has previously been associated with a control.



 
pascal OSStatus GetControlPropertySize (

                     ControlHandle control,

                     OSType propertyCreator,

                     OSType propertyTag,

                     UInt32 *size);

control: A value of type ControlHandle . Pass a handle to the control whose associated data you wish to examine.
propertyCreator: A four-character code. Pass your program's signature, as registered through Apple Developer Technical Support. If your program is of a type that would not normally have a signature (for example, a plug-in), you should still register and use a signature in this case, even though your program's file may not have the same creator code as the signature that you register. The 'macs' property signature is reserved for the system and should not be used.
propertyTag: A four-character code. Pass the application-defined code identifying the data.
size: A pointer to an unsigned 32-bit integer. On return, this value is set to the actual size of the data.
function result: A result code. See Result Codes for the Mac OS 8.5 Control Manager .

DISCUSSION

If you want to retrieve a piece of associated data with the function GetControlProperty , you will typically need to use the GetControlPropertySize function beforehand to determine the size of the associated data.

VERSION NOTES

Available with Mac OS 8.5 and later.