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E2241: VCL style classes need virtual destructors
Example
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Destructors defined in VCL style classes have to be virtual. 

 

Example
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struct__declspec(delphiclass) vclclass1
{
~vclclass1() {}           // Error
};
struct__declspec(delphiclass) vclclass2
{
virtual ~vclclass2() {}   // OK
};
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