ADO編程中ATL所遇到的定義問題?
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當(dāng)欲向接口中定義方法如下：

[id(1), helpstring("method SearchCust")] HRESULT SearchCust([in] BSTR bstrcustid,[out,retval] _Recordset **ptr);

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由于用到_Recordset類型，所以必須

??? importlib("C:/Program Files/Common Files/System/ADO/MSADO15.DLL");

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于是整個(gè)idl文件應(yīng)該改寫為以下方式：

// FindCust.idl : IDL source for FindCust.dll

//

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// This file will be processed by the MIDL tool to

// produce the type library (FindCust.tlb) and marshalling code.

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import "oaidl.idl";

import "ocidl.idl";

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[

?????? uuid(B32A7D72-12D4-11D5-AC09-00A0247A8577),

?????? version(1.0),

?????? helpstring("FindCust 1.0 Type Library")

]

library FINDCUSTLib??? //Library給手動提前了

{

?????? importlib("stdole32.tlb");

?????? importlib("stdole2.tlb");

//MODIFY HERE

??? importlib("C:/Program Files/Common Files/System/ADO/MSADO15.DLL");

?????? [

????????????? object,

????????????? uuid(B32A7D7F-12D4-11D5-AC09-00A0247A8577),

????????????? dual,

????????????? helpstring("ISearch Interface"),

????????????? pointer_default(unique)

?????? ]

?????? interface ISearch : IDispatch

?????? {

????????????? [id(1), helpstring("method SearchCust")] HRESULT SearchCust([in] BSTR bstrcustid,[out,retval] _Recordset **ptr);

?????? };

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?????? [

????????????? uuid(B32A7D81-12D4-11D5-AC09-00A0247A8577),

????????????? helpstring("_ISearchEvents Interface")

?????? ]

?????? dispinterface _ISearchEvents

?????? {

????????????? properties:

????????????? methods:

?????? };

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?????? [

????????????? uuid(B32A7D80-12D4-11D5-AC09-00A0247A8577),

????????????? helpstring("Search Class")

?????? ]

?????? coclass Search

?????? {

????????????? [default] interface ISearch;

????????????? [default, source] dispinterface _ISearchEvents;

?????? };

};
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