Delphi DDE Callback

0
votes

I would like to receive Item to my DDE Client in Delphi every time when Item is changing. I know that is function DDE Callback. Can you tell me how I should use it? Hawe you maybe some code examples?

-- Pawel

1
delphidde
Wow, DDE, how very 20th century. Isn't it time to move on to something more robust. blogs.msdn.com/b/oldnewthing/archive/2007/02/26/1763683.aspx - David Heffernan
What kind of item are you trying to monitor exactly? - Remy Lebeau
@DavidHeffernan, in principle I agree, but sometimes you have no control over the other side. - Uwe Raabe

1 Answers

3
votes

In case it really has to be DDE:

  • Place a TDdeClientConv and a TDdeClientItem onto a form.
  • Connect the TDdeClientItem to the TDdeClientConv.
  • Set the ServerApplication, DdeService, DdeTopic and DdeItem properties according to your needs.
  • Implement the OnChange event of the TDdeClientItem. The current value can be read from the Text and/or Lines property.