Can we use RemoteCall inside Component Interface ?

My answer is NO , I have a requirement to automate the cancellation of award in the Award Entry page (PeopleSoft Student Administration: Financial Aid). The approach was to make a Component Interface and run it thru App Engine as batch process. In the page there are 4 buttons and 2 of these buttons should be click to validate and post data in the database. I created a new custom methods in my CI and put the peoplecode behind the button so that I can just call these methods in my AppEngine, but I encountered an error while running my program. I learned that I can't use RemoteCall inside the CI method. So after several trial and error, I came up with the solution to separate the remotecall from other codes and put it on the AppEngine PeopleCode. The AppEngine/CI Peoplecode looks like these;

Function Validate()
commitwork();
RemoteCall(call validateCOBOL program.......);
End-Function;

Function Post()
commitwork();
RemoteCall(call postCOBOL program.......);
End-Function;

try 

&ci = &session.GetCompIntfc(CompIntfc.yourCI);
.
.
.
&ci.PreValidate(); /*my custom CI method contains code to validate before RemoteCall*/
Validate(); 
&ci.PostValidate(); /*my custom CI method contains code to validate after RemoteCall*/

&ci.PrePost(); /*my custom CI method contains code to post before RemoteCall*/
Post();
&ci.Posted(); /*my custom CI method contains code to post after RemoteCall*/

.
.
.
end-try;