GetWindowPropertySize

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

Programming With the Mac OS 8.5 Window Manager

GetWindowPropertySize

Obtains the size of a piece of data that is associated with a window.



 
pascal OSStatus GetWindowPropertySize (

                     WindowPtr window,

                     PropertyCreator creator,

                     PropertyTag tag,

                     UInt32 *size);

window: A value of type WindowPtr . Pass a pointer to the window to be examined for associated data.
creator: A four-character code. Pass the creator code (typically, the application's signature) of the associated data whose size is to be obtained.
tag: A four-character code. Pass the application-defined code identifying the associated data whose size is to be obtained.
size: A pointer to a value that, on return, specifies the size of the associated data.
function result: A result code. See Result Codes.

DISCUSSION

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

VERSION NOTES

Available with Mac OS 8.5 and later.