Depending on the patch you use in Dim-Pro you may need to edit the MIDI.

When I read this thread it sounded like enable midi out worked.  Definitely should have done more research.
 
I will once and for all put down here - Enable Midi Out does work in EZ Keys.  You cannot trigger an external vsti with the midi you create in EZ keys.  If you must have this function, buy something else.  As noted the only way to move the midi is to drag and drop.
 
Interestingly in the demo version of EZ Keys, you can select enable midi out, it is just that nothing goes out.  I assumed that it worked and it was just blocked in the demo version.  When you authorize the full version, the enable midi out is grayed out and not even select-able.
 
Not sure if this is by design or not, but it got me.  If I knew there was no midi out of EZ keys, I would not have bought it.
 
It still is pretty nice all in all, just a little disappointed that I could not have this trigger an external synth directly..
 
 See below - I take it all back

I assure you that EZkeys will send midi out to Dimension Pro if you know what you are doing.  I had it set up and running within about 5 minutes.
 
Here is the key thing:  Do not use an instrument track.  Use the separate midi and audio track option.  Make sure you enable midi out in your INSERT SOFTSYNTH OPTIONS window when you add your EZkeys tracks.
 
Then open your softsynth properties for EZkeys and select the Midi Out option in the EZkeys menu.
 
Insert a softsynth again and choose Dim Pro.  Load a sample set into Dim Pro.  Make sure you are getting sound out of Dim Pro first. 
 
Now go back to the midi track for EZkeys and set the output to go to Dim Pro.
 
Open the Synth Properties for EZkeys again and make sure FOLLOW HOST is selected.  Now drag the midi clips from the EZkeys browser into the EZKeys songtrack.  Turn down the volume on the EZKeys output knob.
 
(EDIT:  Actually, the knob setting won't matter if you have the EZkeys midi track output set to Dim Pro.
 
In experimentation to see what you could have done wrong I ran into an issue where if the EZkeys midi track input was set to NONE, no midi would go to Dim Pro.  However, if I set the Dim Pro input to Omni or EZkeys, I would get sound again.  Another odd thing I discovered was that if I set the output of the EZKeys midi track to Dim Pro and the input of Dim Pro to EZkeys, it would double the volume.  I think this could be a SONAR bug. )
 
Rewind SONAR and press play.  You should now hear Dim Pro playing the content of the EZkeys Songtrack.
 
Here's something to keep in consideration:  Although there is one advantage to composing your midi keyboard track in EZkeys, there is also one drawback.  EZkeys will be subject to latency from the midi output.  So just like playing a live keyboard with a high latency setting in SONAR will cause the audio to come out delayed in any softsynth, you will have the same thing happen coming out of EZkeys.  Therefore, do your keyboard tracks early and freeze the audio.

Otherwise copy the midi in the EZkeys song track and drag it into SONAR.
 
 

See? I was wrong.

My Synth properties.  I cannot enable midi out.
 
I also cannot seem to attach a screen capture to show you what I mean.  man i hate this forum software.
 
 

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This is what I see in synth properties details.  As long as supports event output is NO, I m not sure how this would work.
 
Mr Mod Bod, do you perhaps have some deluxe version of EZ keys that supports this ?
 
JR

That's not your Synth Properties Window.  That is your Plug In Properties Window.  Get to your Synth Properties via the Synth Rack. 
 
I have no special enhanced version of EZkeys.  Sometimes I do but this isn't one of those times.

You need to do a little study on the SONAR command INSERT SOFT SYNTH.  EZkeys is a special instrument in that it also has it's own midi engine.  That is why using the instrument track isn't advised on this one.

Dave forgot one important thing - "Input Echo" must be turned on. Once you enable input Echo, I think you will have better results. :-D

btw - I have dimension Pro playing all kinds of patterns from EZKeys as direct input to DimPro without issue.

Yes Conley, that is important.  It's a given since all softsynths need to have that on if you want to hear them when you play your keyboard in real time.  My input echo is automatically turned on when I insert a softsynth so I didn't think that was pertinent but in this case, I don't think you can assume anything.

Fact is, EZkeys works as intended.  Guys like you (Conley) make sure of that (as best as you can) during the betatesting cycle.