TCL Script receiving DDE

Question

I want to create a TCL application that receives data over DDE and displays it on a TK Widget. At the moment I' developing the app on a Wish Console. I have an application that will send DDE data to Excel and I 'think' it is sending data to my TCL console (the app doesn't give out an error message) but I can't see the result :-( In TCL stuff I have written in the past I have 'pushed' and 'pulled' data ofer DDE, my app has never been the recipient of a 'push'. What should I be looking for in my console?

TIA mark

Donal Fellows Donal Fellows · Accepted Answer · 2015-01-27T13:37:25

The call you are looking for is dde servername. You use it's -handler option to install a handler for the service name TclEval and the topic with the name you choose. The handler takes a single argument.

package require dde
dde servername -handler MyDdeHandler "MySampleTopic"
proc MyDdeHandler {request} {
    puts "The request was '$request'"
    return "this is an example response"
}

Note that the other side still has to talk to the correct service/topic.

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TCL Script receiving DDE

1 Answers