cannot instantiate abstract class

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I am updating interface of an active x control. It has dual interface. I have manually updated the odi file, compiled it, and added the new methods to co-class and dual interface. On compilation , I get the error 'cannot instantiate abstract class Cobject::XObject due to members --- list of newly added members'. I have checked having updated dispatch & dual maps and added methods for both. But still compilation error remains?

Posted 10-Jan-11 0:54am

Rajesh G Manwani from Mumbai

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2 solutions

Solution 1

check calling convention, parameters and so on. everything must match the expected method signatures.

Regards
Espen Harlinn

Posted 10-Jan-11 1:06am

Espen Harlinn

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#realJSOP · Accepted Answer · 2011-01-10T01:48:00

Solution 2

An abstract class cannot be instantiated. You MUST derive a new class from it, and implement all of the pure virtual functions in it, and then use the new class instead.

This is basic C++ stuff...

Posted 10-Jan-11 1:48am

#realJSOP

Comments

Vigneshb6 10-Jan-11 8:10am

Yes, It is basic

fjdiewornncalwe 10-Jan-11 13:39pm

+5... Perfect.