WM_COMMAND WM_NOTIFY custom notification code

Question

I wish to define a new nofication id that will be used in WM_COMMAND messages of my subclassed control. But I failed to find any rules of creating user control-defined notification codes.

Answer 1

See technical note 20, 21 and 22 on that:

• TN020: ID Naming and Numbering Conventions

• TN021: Command and Message Routing

• TN022: Standard Commands Implementation

Short answer: pick a number in the range 0x8000 - 0xDFFF .