PyWin SendMessage

Tim Roberts timr at
Sun Oct 2 03:38:22 CEST 2005

Gonzalo Monzón <gmc at> wrote:
>Hi Gerd,
>I'm not really sure of, but I think you must use a message value in 
>range of WM_USER or WM_APP so this fact maybe let the receiver window 
>getting bad data... 

No.  WM_COPYDATA is designed specifically for his use case -- interprocess
communication.  The WM_USER range is only if you are inventing a custom
message for some new purpose.
- Tim Roberts, timr at
  Providenza & Boekelheide, Inc.

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