ATTR_WIN_PROC_RET_VAL
| Data Type: | integer |
| Access: | read/write |
| Functions: | SetMsgCallbackAttribute GetMsgCallbackAttribute |
| Description: | Specifies what to return from the user callback if you do not call the default message handler of the operating system (ATTR_CALL_DEF_WIN_PROC is set to FALSE). Linux: This attribute is not supported. |
| LabWindows/CVI Compatibility: |
LabWindows/CVI 8.5 and later |