Sets the value of a component property using a variant value.
SetPropValue utilises Delphi's RTTI (Run Time Type Information) to set the value of a component's property using a variant value.
In the other form of this function, the name of the property, PropName, is explicitly given.
In both forms of the function, the new property value is defined by Value. Note that only certain property assignments are possible using variants. It is normally be used when using GetPropValue from another property.
The intrinsic value of this function is to allow setting of component properties without the need to hard code the property name. This allows mass visual component processing at run time.
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