Board index » cppbuilder » Broadcasting String to All Applications

2004-08-25 10:23:01 PM
cppbuilder44
Hello, I am trying to figure out how to broadcast a string out to all
applications
running on windows 2000! If an one has any ideas that would be great
 

What do you mean by "string"?
If you mean an array of characters, then you cannot "broadcast a
string".
What you can do is broadcast a message (perhaps with
BroadcastSystemMessage or by doing a SendMessageCallback with a window
handle of HWND_BROADCAST) and, upon receiving a reply from a window,
post a WM_COPYDATA message containing the data in the array. You must
use the copy data step because the address your program has for the
string is a virtual address, unique to your program and invalid if
used by other programs.
. Ed

"JP" < XXXX@XXXXX.COM >wrote:
their design. You might even crash the system.
If another application is using custom messages and they didn't
register (and you as well) a unique message with windows, your
broadcast could cause another program to think that it sent it's
self a message which would cause it act on a bogus message.
~ JD
 

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