警告MIDL2456:SAFEARRAY(接口指针)... [英] warning MIDL2456 : SAFEARRAY(interface pointer)...

问题描述

这是我第一次尝试使用SAFEARRAY.
我在IDL中有以下方法声明:

This is the first time I am trying to use SAFEARRAYs.
I have the following method declaration in IDL:

//.IMyObj2
[
	object,
	uuid(3454B81A-65A9-4F3E-8678-1D5F82B25837),
	oleautomation,
	nonextensible,
	helpstring("IMyObj2 Interface"),
	pointer_default(unique)
]
interface IMyObj2 : IDispatch{
};
//.IArrayMan3 
[
	object,
	uuid(EF532C8B-12A9-4FEC-B91C-D7502FD68874),
	oleautomation,
	nonextensible,
	helpstring("IArrayMan3 Interface"),
	pointer_default(unique)
]
interface IArrayMan3 : IUnknown{
	[helpstring("method GetArray")] 
	HRESULT _stdcall GetArray2(SAFEARRAY(IMyObj2*)* pArray);
	[helpstring("method PutArray")] 
	HRESULT _stdcall PutArray2(SAFEARRAY(IMyObj2*) pArray);
};

我收到以下警告:

I get the following warning:

warning MIDL2456 : SAFEARRAY(interface pointer) doesn't work using midl generated proxy : [ Parameter 'pArray' of Procedure 'PutArray2' ( Interface 'IArrayMan3' ) ]

在此先感谢您.

Thanks in advance.

推荐答案

您是否已将其声明为库?如果是这样，则可以使用OleView实用程序检查.tlb文件中的输出.
仅当此接口没有库封装时，我才会收到此警告.

避免此警告消息的另一种方法可能是使用以下技巧:

Have you declared it as a library? If so, you can use OleView utility to check output in your .tlb file.
I receive this warning only if there is no library incapsulation for this interfaces.

The other way to avoid this warning message might be using the following trick:

struct SMyObj{
    IMyObj2 * iobject;
};

interface IArrayMan3 : IUnknown{
[helpstring("method GetArray")]
HRESULT _stdcall GetArray2(SAFEARRAY(struct SMyObj*)* pArray);
[helpstring("method PutArray")]
HRESULT _stdcall PutArray2(SAFEARRAY(struct SMyObj*) pArray);
};

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