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RAD Studio VCL Reference
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TCustomVariantType.Create Constructor ()
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RAD Studio VCL Reference
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Creates an instance of TCustomVariantType.
constructor Create; overload; constructor Create(RequestedVarType: TVarType); overload;
__fastcall TCustomVariantType(); __fastcall TCustomVariantType(TVarType RequestedVarType);
Call Create in the initialization section of the unit that defines your TCustomVariantType descendant to instantiate a single instance of the custom System::Variant type. This single instance automatically registers itself with the System::Variant system so that the custom System::Variant type is enabled in the application.
The RequestedVarType parameter specifies a type code for the new custom System::Variant type. It must be in the range from $010F to $0FFF.
When called with no parameters, the constructor generates a new type code for the custom System::Variant type.
The TCustomVariantType constructor raises an exception if there is a problem with the new System::Variant type code. Such problems include
The RequestedVarType parameter specifies a type code that is already used by another System::Variant type.
The RequestedVarType parameter specifies a type code that is not in the valid range for custom Variants.
There are too many custom Variants already defined to allow another one.
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