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 # Interface TradeStudyPlugIn::ICombinedPlugIn

 Last update: 16.07.2025 

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**Definition**: `ModelCenter/src/InterfaceDLL\_TradeStudyPlugIn/TradeStudyPlugIn.odl` (line 586)

This interface is used for cases where a plug-in must be both an IComponentPlugIn and an [ITradeStudyPlugIn](interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn.md#interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn). In most cases using this interface is not necessary, but in specific circumstances where COM types are directly instantiated and used between processes such as via Activator.CreateInstance and MarshalForExternalProcess.ComObjectToMarshalInfo.

**Inherits from**:

- [IComponentPlugIn](undefined.md#undefined)
- [TradeStudyPlugIn::ITradeStudyPlugIn](interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn.md#interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn)

## Members

- [construct](interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn.md#interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn_1a2b883bd3725cefb35daf8b629124a57f)
- [fromString](interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn.md#interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn_1a8c4352f776b3919a9a56aa61ff78c5d0)
- [show](interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn.md#interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn_1a7238385b054e9afddbe65c65644826e4)
- [toString](interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn.md#interfaceTradeStudyPlugIn_1_1ITradeStudyPlugIn_1a58cdb46e4e8dca27761d7bd976c8fcf2)