visual basic DDE

[Datman 0]

Hi Guys Im having a play at the moment with visual basic 6, using DDE with RS Linx OEM to read tag values from a micrologix 1500. I managed to set up the DDE topic and get it working ok, however my visual basic methods are a bit hit and miss. I'm a bit confused as to what project references one would need to use in VB to achieve this. I used Microsoft Excel 9.0 Object library and it seems to work. Just wondering if anyone knows what libraries achieve what. Thanks guys.

[Sergei Troizky 26]

Read this: http://forums.mrplc.com/index.php?showtopic=5420&hl=

[Guest trn_psycho]

And the answer is... None... VB6 supports DDE right out of the box... You can create a blank textbox and set it's linkTopic to RSLinx|whatever (whatever being the name of your topic), and it's linkItem to the value you'd like to read from the PLC (ex:n37:10). Then depending on how you use the linkMode you can update the value with a button's click event or, just have it autoUpdate. (To autoUpdate, just set the linkMode to 1-Automatic)

[Datman 0]

So true! Fantastic, thanks for the help guys