一个COM获取虚拟表指针的问题，我晕菜了，看不懂，用过的朋友指教一个，谢谢

[wzswgbx]

LPVOID FAR* ppIface=NULL;


const GUID MyOcxCLSID = {0xB26F6246,0x4C7D,0x11D1,0x91,0x0E,0x00,0x60,0x08,0x07,0x16,0x3F }; //My CLSID:XCDZIP35.OCX
const IID MyOcxFaceID = {0xB26F6244,0x4C7D,0x11D1,0x91,0x0E,0x00,0x60,0x08,0x07,0x16,0x3F };

if (CoInitialize(NULL) != S_OK)
{
printf("Initialize COM library failed!\n");
return 1L;
}

hResult = CoCreateInstance(MyOcxCLSID, NULL,CLSCTX_INPROC_SERVER, IID_IUnknown, (void **)&pUnknown);
if (hResult != S_OK)
{
printf("Create object failed!\n");
return 1L;
}

hResult = pUnknown->QueryInterface(IID_IUnknown, (void **)&ppIface);

if (hResult != S_OK) {
pUnknown->Release();
printf("QueryInterface IDictionary failed!\n");
return 1L;
}

上面的IID_IUnknown指向的不是我的OCX的对象，是系统OLEXXX的，导致我后面ppIface获取的不是我的OCX接口指针，我用MyOcxFaceID代替也没用,我用OLE-VIEW查了一下我的OCX,

// Generated .IDL file (by the OLE/COM Object Viewer)
// typelib filename: XCDZIP35.OCX
[
uuid(B26F6243-4C7D-11D1-910E-00600807163F),
version(2.78),
helpstring("Xceed Zip ActiveX Control")
]
library XCEEDZIPLib
{
// TLib : // TLib : Standard OLE Types : {BEF6E001-A874-101A-8BBA-00AA00300CAB}
importlib("olepro32.dll");
// TLib : OLE Automation : {00020430-0000-0000-C000-000000000046}
importlib("stdole32.tlb");
// Forward declare all types defined in this typelib
dispinterface _DXceedZip;
dispinterface _DXceedZipEvents;

[
uuid(B26F6244-4C7D-11D1-910E-00600807163F),
helpstring("Dispatch interface for the Xceed Zip Control"),
hidden
]
dispinterface _DXceedZip {
properties:
[id(0x00000001)]
VARIANT_BOOL Abort;
[id(0x00000002)]
short Compression;
………………
[id(0x00000026)]
VARIANT_BOOL SfxInstallMode;
[id(0x00000027), hidden]
BSTR InternalState;
methods:
[id(0x00000028), propget]
BSTR SfxPrompts(short SfxPromptID);
[id(0x00000028), propput]
void SfxPrompts(
short SfxPromptID,
BSTR rhs);
………………
[id(0x0000003b)]
void SfxResetDefaultStrings();
[id(0xfffffdd8)]
void AboutBox();
};

[
uuid(B26F6245-4C7D-11D1-910E-00600807163F),
helpstring("Event interface for the Xceed Zip Control")
]
dispinterface _DXceedZipEvents {
properties:
methods:
[id(0x00000001)]
void Adding(
BSTR* FileName,
long Size,
long PSize,
long Processed,
short FileAttr,
BSTR* FTime,
long CRC,
short Ratio,
short Completion,
short Method,
short Encrypted,
short ComLen,
BSTR* Comment);
………………
};

[
uuid(B26F6246-4C7D-11D1-910E-00600807163F),
helpstring("Xceed Zip Control"),
control
]
coclass XceedZip {
[default] dispinterface _DXceedZip;
[default, source] dispinterface _DXceedZipEvents;
};
};

请问一下，这到底怎么回到，我想获取我的OCX的虚拟表

[蒋晟]

看看注册表里对应CLSID下面的类厂信息是不是正确

[worldy]

使用#import，然后使用智能指针

[wzswgbx]

引用 1 楼 jiangsheng 的回复:

看看注册表里对应CLSID下面的类厂信息是不是正确

TypeLib:{B26F6243-4C7D-11D1-910E-00600807163F}
ProgID:XCEEDZIP.XceedZipCtrl.1
这些应该没错
类ID是肯定没错的
路径也正确 C:\Windows\SysWow64\XCDZIP35.OCX

引用 2 楼 worldy 的回复:

使用#import，然后使用智能指针

试过，好像也一样

[wzswgbx]

引用 4 楼 SXJIAKE 的回复:

为什么两处都是 MyOcxFaceID，不知道你 QueryInterface 的意义何在。
hResult = CoCreateInstance(MyOcxCLSID, NULL,CLSCTX_INPROC_SERVER, IID_IUnknown, (void **)&pUnknown);
hResult = pUnknown->QueryInterface(IID_IUnknown, (void **)&ppIface);

下面这句是调用之后返回的IID
hResult = CoCreateInstance(MyOcxCLSID, NULL,CLSCTX_INPROC_SERVER, IID_IUnknown, (void **)&pUnknown);

下面这句是利用返回的IID来查询
hResult = pUnknown->QueryInterface(IID_IUnknown, (void **)&ppIface);


请问这错在哪呢

[「已注销」]

为什么两处都是 MyOcxFaceID，不知道你 QueryInterface 的意义何在。
hResult = CoCreateInstance(MyOcxCLSID, NULL,CLSCTX_INPROC_SERVER, IID_IUnknown, (void **)&pUnknown);
hResult = pUnknown->QueryInterface(IID_IUnknown, (void **)&ppIface);

[「已注销」]

为什么两处都不是 MyOcxFaceID

[「已注销」]

hResult = pUnknown->QueryInterface(IID_IUnknown, (void **)&ppIface);
这样查出来难道 ppIface 和 pUnknown 的值不应该时一样的吗？你不是因该查询你自己的接口指针吗：
hResult = pUnknown->QueryInterface(MyOcxFaceID, (void **)&ppIface);

ppIface 的声明也有问题：
LPVOID FAR *ppIface = NULL;
1. 不应该是接口的指针，怎么是 LPVOID 指针呢？不过也不是不行，后面可以强转。
2. 怎么是二级指针，&ppIface 岂不是三级指针了。还是没关系，同样可以强转。

[wzswgbx]

因为我不知道这个OCX的接口，只知道CLSID,试了上面uuid都不行,想通知这个
hResult = CoCreateInstance(MyOcxCLSID, NULL,CLSCTX_INPROC_SERVER, IID_IUnknown, (void **)&pUnknown);
来获取