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Ecco DDE & Add-On Programming tips, tricks, techniques (Learn & Share!) >> DDE Interfacing with Ecco - How to... >> Execute vs Request :: why and how!
http://forums.eccoMAGIC.com/forum/YaBB.pl?num=1193874100

Message started by Admin on 10/31/07 at 18:41:40

Title: Execute vs Request :: why and how!
Post by Admin on 10/31/07 at 18:41:40

[smiley=thumbsup.gif] Nicely done! & Helpful !

DDEExecute(iconn,doit) [(connection, command)] is an "Execute" statement, which does not ask for a return value.

DDERequest uses 'atoms' to send data TO ecco, which are limited to 256 characters, so you use a DDEExecute which uses a shared memory string to send much larger (up to 24 or 32k depending.. on what ecco will handle) data.

but Execute is not made/intended to RETURN information... other than a few bytes...

so Ecco was designed to allow you a "Request" to use in conjunction with the execute...

ie.

Quote:

' the next odd thing is that you get nothing back when sending a large string
newid=DDEExecute(iconn,doit) 'Newid here shows up as blank (timing issues?)
newid=DDERequest(iconn,"GetLastResult") ' But prodding again gets a valid newid value
' which lets us move the newly inserted item under the parent ("d" is the flag for "daughter")
DDEExecute(iconn, "InsertItem,"& str(rootid)& ",d," &str(newid))

is because Execute does not *ever* send back any ecco id#,

"GetLastResult" is intended to be used exactly as you have used it!, in partner with an execute command.

ps: (for others) same basic structure of DDE commands to Ecco works from within Word or Excel.....

Title: Re: Execute vs Return :: why and how!
Post by pplandry on 11/01/07 at 12:34:25

I use DDERequest and have no problem retrieving large amounts of text. The trick is to use a textbox with multiline=true as the DDE link. More details avail. if required.

Title: Re: Execute vs Request :: why and how!
Post by Admin on 11/01/07 at 18:54:39

Yes, indeed. Do share!!