TObject::MethodAddress Method (ShortString)

Returns the address of a class method by name.

Pascal

class function MethodAddress(const Name: ShortString): Pointer; overload;
class function MethodAddress(const Name: string): Pointer; overload;

C++

Pointer MethodAddress(const ShortString Name);
Pointer MethodAddress(const string Name);

Description

There are situations where it is useful to be able to invoke an object method without the need to hard code the method name in advance. Call System::TObject::MethodAddress to dynamically retrieve the address of such a method by specifying the method Name as a string.

An easy way to invoke the method is to define a procedure or function data type, such as :

type TProc = procedure of object;

Assign the object name, and the System::TObject::MethodAddress to a TMethod variable, such as :

MethodVar.Data := Pointer(ObjectInstanceName);

MethodVar.Code := ObjectInstanceName.System::TObject::MethodAddress('MethodNameString');

And pass this in a call to a variable of the procedure or function type :

Proc := TProc(MethodVar);

Proc;