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C# - 编写 COM 服务器 - 映射到方法的属性

发布于 2024-08-08 13:19:22 字数 13024 浏览 1 评论 0原文

我们正在尝试替换最初为 VB6 应用程序编写的 COM 服务器。

我们无法访问源代码。

由于某种原因，VB6 应用程序可以调用我们的构造函数，但随后它会得到：

系统错误 &H80004002。没有这样的 支持接口。

我假设当它尝试使用 QueryInterface 获取接口时。

我们通过 regasm /tlb 和 gacutil 正确发送了程序集，但随后我注意到一些奇怪的事情。我打开为我们的程序集生成的 .tlb 文件 regasm，并注意到界面上的所有属性都显示为方法。

这是 .Net 工具正在做的事情吗？这会导致我的问题吗？

这是原始文件的完整 tlb 定义：

// Generated .IDL file (by the OLE/COM Object Viewer)
// 
// typelib filename: UtopiaKeyboard.tlb

[
  uuid(9B4E1840-FF65-11CF-AA2E-0020AFA49D5A),
  version(1.0),
  helpstring("OPOS POSKeyboard OLE Control")
]
library POSKEYBOARDLib
{
    // TLib :     // TLib : OLE Automation : {00020430-0000-0000-C000-000000000046}
    importlib("STDOLE2.TLB");

    // Forward declare all types defined in this typelib
    dispinterface _DPOSKeyboard;
    dispinterface _DPOSKeyboardEvents;

    [
      uuid(9B4E1841-FF65-11CF-AA2E-0020AFA49D5A),
      helpstring("Dispatch interface for OPOS POSKeyboard OLE Control"),
      hidden
    ]
    dispinterface _DPOSKeyboard {
        properties:
            [id(0x00000001)            
]
            BSTR CheckHealthText;
            [id(0x00000002)            
]
            VARIANT_BOOL Claimed;
            [id(0x00000003)            
]
            VARIANT_BOOL DataEventEnabled;
            [id(0x00000004)            
]
            VARIANT_BOOL DeviceEnabled;
            [id(0x00000005)            
]
            VARIANT_BOOL FreezeEvents;
            [id(0x00000006)            
]
            long ResultCode;
            [id(0x00000007)            
]
            long ResultCodeExtended;
            [id(0x00000008)            
]
            long State;
            [id(0x00000009)            
]
            BSTR ControlObjectDescription;
            [id(0x0000000a)            
]
            long ControlObjectVersion;
            [id(0x0000000b)            
]
            BSTR ServiceObjectDescription;
            [id(0x0000000c)            
]
            long ServiceObjectVersion;
            [id(0x0000000d)            
]
            BSTR DeviceDescription;
            [id(0x0000000e)            
]
            BSTR DeviceName;
            [id(0x0000000f)            
]
            long POSKeyData;
            [id(0x0000001a)            
]
            VARIANT_BOOL AutoDisable;
            [id(0x0000001b)            
]
            long BinaryConversion;
            [id(0x0000001c)            
]
            long DataCount;
            [id(0x0000001d)            
]
            VARIANT_BOOL CapKeyUp;
            [id(0x0000001e)            
]
            long EventTypes;
            [id(0x0000001f)            
]
            long POSKeyEventType;
            [id(0x00000021)            
]
            long CapPowerReporting;
            [id(0x00000022)            
]
            long PowerNotify;
            [id(0x00000023)            
]
            long PowerState;
        methods:
            [id(0x00000010)]
            long Open([in] BSTR DeviceName);
            [id(0x00000011)]
            long Close();
            [id(0x00000012)]
            long Claim([in] long Timeout);
            [id(0x00000013)]
            long Release();
            [id(0x00000014)]
            long CheckHealth([in] long Level);
            [id(0x00000015)]
            long ClearInput();
            [id(0x00000016)]
            long DirectIO(
                            [in] long Command, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000017)]
            void SOData([in] long Status);
            [id(0x00000018)]
            void SODirectIO(
                            [in] long EventNumber, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000019)]
            void SOError(
                            [in] long ResultCode, 
                            [in] long ResultCodeExtended, 
                            [in] long ErrorLocus, 
                            [in, out] long* pErrorResponse);
            [id(0x00000020)]
            long SOProcessID();
            [id(0x00000024)]
            void SOStatusUpdate([in] long Status);
    };

    [
      uuid(9B4E1842-FF65-11CF-AA2E-0020AFA49D5A),
      helpstring("Event interface for OPOS POSKeyboard OLE Control")
    ]
    dispinterface _DPOSKeyboardEvents {
        properties:
        methods:
            [id(0x00000001)]
            void DataEvent([in] long Status);
            [id(0x00000002)]
            void DirectIOEvent(
                            [in] long EventNumber, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000003)]
            void ErrorEvent(
                            [in] long ResultCode, 
                            [in] long ResultCodeExtended, 
                            [in] long ErrorLocus, 
                            [in, out] long* pErrorResponse);
            [id(0x00000004)]
            void StatusUpdateEvent([in] long Status);
    };

    [
      uuid(9B4E1843-FF65-11CF-AA2E-0020AFA49D5A),
      helpstring("OPOS POSKeyboard OLE Control"),
      control
    ]
    coclass POSKeyboard {
        [default] dispinterface _DPOSKeyboard;
        [default, source] dispinterface _DPOSKeyboardEvents;
    };
};

这是我的 .Net 程序集的生成 tlb：

// Generated .IDL file (by the OLE/COM Object Viewer)
// 
// typelib filename: POSKEYBOARDLib.tlb

[
  uuid(9B4E1840-FF65-11CF-AA2E-0020AFA49D5A),
  version(1.0),
  custom(90883F05-3D28-11D2-8F17-00A0C9A6186D, "POSKEYBOARDLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=5824208931aaf68b")

]
library POSKEYBOARDLib
{
    // TLib :     // TLib : mscorlib.dll : {BED7F4EA-1A96-11D2-8F08-00A0C9A6186D}
    importlib("mscorlib.tlb");
    // TLib : OLE Automation : {00020430-0000-0000-C000-000000000046}
    importlib("STDOLE2.TLB");

    // Forward declare all types defined in this typelib
    dispinterface _DPOSKeyboard;
    dispinterface _DPOSKeyboardEvents;

    [
      uuid(9B4E1841-FF65-11CF-AA2E-0020AFA49D5A),
      version(1.0),
      custom(0F21F359-AB84-41E8-9A78-36D110E6D2F9, "POSKEYBOARDLib._DPOSKeyboard")    

    ]
    dispinterface _DPOSKeyboard {
        properties:
        methods:
            [id(0x00000001), propget]
            BSTR CheckHealthText();
            [id(0x00000001), propput]
            void CheckHealthText([in] BSTR rhs);
            [id(0x00000002), propget]
            VARIANT_BOOL Claimed();
            [id(0x00000002), propput]
            void Claimed([in] VARIANT_BOOL rhs);
            [id(0x00000003), propget]
            VARIANT_BOOL DataEventEnabled();
            [id(0x00000003), propput]
            void DataEventEnabled([in] VARIANT_BOOL rhs);
            [id(0x00000004), propget]
            VARIANT_BOOL DeviceEnabled();
            [id(0x00000004), propput]
            void DeviceEnabled([in] VARIANT_BOOL rhs);
            [id(0x00000005), propget]
            VARIANT_BOOL FreezeEvents();
            [id(0x00000005), propput]
            void FreezeEvents([in] VARIANT_BOOL rhs);
            [id(0x00000006), propget]
            long ResultCode();
            [id(0x00000006), propput]
            void ResultCode([in] long rhs);
            [id(0x00000007), propget]
            long ResultCodeExtended();
            [id(0x00000007), propput]
            void ResultCodeExtended([in] long rhs);
            [id(0x00000008), propget]
            long State();
            [id(0x00000008), propput]
            void State([in] long rhs);
            [id(0x00000009), propget]
            BSTR ControlObjectDescription();
            [id(0x00000009), propput]
            void ControlObjectDescription([in] BSTR rhs);
            [id(0x0000000a), propget]
            long ControlObjectVersion();
            [id(0x0000000a), propput]
            void ControlObjectVersion([in] long rhs);
            [id(0x0000000b), propget]
            BSTR ServiceObjectDescription();
            [id(0x0000000b), propput]
            void ServiceObjectDescription([in] BSTR rhs);
            [id(0x0000000c), propget]
            long ServiceObjectVersion();
            [id(0x0000000c), propput]
            void ServiceObjectVersion([in] long rhs);
            [id(0x0000000d), propget]
            BSTR DeviceDescription();
            [id(0x0000000d), propput]
            void DeviceDescription([in] BSTR rhs);
            [id(0x0000000e), propget]
            BSTR DeviceName();
            [id(0x0000000e), propput]
            void DeviceName([in] BSTR rhs);
            [id(0x0000000f), propget]
            long POSKeyData();
            [id(0x0000000f), propput]
            void POSKeyData([in] long rhs);
            [id(0x00000010)]
            long Open([in] BSTR DeviceName);
            [id(0x00000011)]
            long Close();
            [id(0x00000012)]
            long Claim([in] long Timeout);
            [id(0x00000013)]
            long Release();
            [id(0x00000014)]
            long CheckHealth([in] long Level);
            [id(0x00000015)]
            long ClearInput();
            [id(0x00000016)]
            long DirectIO(
                            [in] long Command, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000017)]
            void SOData([in] long Status);
            [id(0x00000018)]
            void SODirectIO(
                            [in] long EventNumber, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000019)]
            void SOError(
                            [in] long ResultCode, 
                            [in] long ResultCodeExtended, 
                            [in] long ErrorLocus, 
                            [in, out] long* pErrorResponse);
            [id(0x0000001a), propget]
            VARIANT_BOOL AutoDisable();
            [id(0x0000001a), propput]
            void AutoDisable([in] VARIANT_BOOL rhs);
            [id(0x0000001b), propget]
            long BinaryConversion();
            [id(0x0000001b), propput]
            void BinaryConversion([in] long rhs);
            [id(0x0000001c), propget]
            long DataCount();
            [id(0x0000001c), propput]
            void DataCount([in] long rhs);
            [id(0x0000001d), propget]
            VARIANT_BOOL CapKeyUp();
            [id(0x0000001d), propput]
            void CapKeyUp([in] VARIANT_BOOL rhs);
            [id(0x0000001e), propget]
            long EventTypes();
            [id(0x0000001e), propput]
            void EventTypes([in] long rhs);
            [id(0x0000001f), propget]
            long POSKeyEventType();
            [id(0x0000001f), propput]
            void POSKeyEventType([in] long rhs);
            [id(0x00000020)]
            long SOProcessID();
            [id(0x00000021), propget]
            long CapPowerReporting();
            [id(0x00000021), propput]
            void CapPowerReporting([in] long rhs);
            [id(0x00000022), propget]
            long PowerNotify();
            [id(0x00000022), propput]
            void PowerNotify([in] long rhs);
            [id(0x00000023), propget]
            long PowerState();
            [id(0x00000023), propput]
            void PowerState([in] long rhs);
            [id(0x00000024)]
            void SOStatusUpdate([in] long Status);
    };

    [
      uuid(9B4E1842-FF65-11CF-AA2E-0020AFA49D5A),
      version(1.0),
      custom(0F21F359-AB84-41E8-9A78-36D110E6D2F9, "POSKEYBOARDLib._DPOSKeyboardEvents")    

    ]
    dispinterface _DPOSKeyboardEvents {
        properties:
        methods:
            [id(0x00000001)]
            void DataEvent([in] long Status);
            [id(0x00000002)]
            void DirectIOEvent(
                            [in] long EventNumber, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000003)]
            void ErrorEvent(
                            [in] long ResultCode, 
                            [in] long ResultCodeExtended, 
                            [in] long ErrorLocus, 
                            [in, out] long* pErrorResponse);
            [id(0x00000004)]
            void StatusUpdateEvent([in] long Status);
    };

    [
      uuid(9B4E1843-FF65-11CF-AA2E-0020AFA49D5A),
      version(1.0),
      custom(0F21F359-AB84-41E8-9A78-36D110E6D2F9, "POSKEYBOARDLib.POSKeyboard")
    ]
    coclass POSKeyboard {
        interface _Object;
        [default] dispinterface _DPOSKeyboard;
        [default, source] dispinterface _DPOSKeyboardEvents;
    };
};

不知何故，我的属性被列为方法...即使我添加 PreserveSig，它仍然会写入 2 个方法，而不是使它们成为属性。

我应该尝试进行哪些更改才能使其与原始 tlb 相同？或者至少让它发挥作用。

更新：发现我的事件界面上没有 DispIdAttribute。已修复该问题，但 VB6 应用程序仍然失败并出现相同的错误。

原文

We are trying to replace a COM server originally written for a VB6 application

We have no access to source code.

For some reason, the VB6 app can call our constructor, but then it gets:

System Error &H80004002. No such
interface supported.

I assume when it tries to get the interface with QueryInterface.

We have our assembly properly sent through regasm /tlb and gacutil, but I then noticed something strange. I opened the .tlb file regasm generated for our assembly, and noticed all the properties on my interface show up as methods.

Is this something the .Net tools are doing? And would this cause my issue?

Here is the full tlb definition for the original file:

// Generated .IDL file (by the OLE/COM Object Viewer)
// 
// typelib filename: UtopiaKeyboard.tlb

[
  uuid(9B4E1840-FF65-11CF-AA2E-0020AFA49D5A),
  version(1.0),
  helpstring("OPOS POSKeyboard OLE Control")
]
library POSKEYBOARDLib
{
    // TLib :     // TLib : OLE Automation : {00020430-0000-0000-C000-000000000046}
    importlib("STDOLE2.TLB");

    // Forward declare all types defined in this typelib
    dispinterface _DPOSKeyboard;
    dispinterface _DPOSKeyboardEvents;

    [
      uuid(9B4E1841-FF65-11CF-AA2E-0020AFA49D5A),
      helpstring("Dispatch interface for OPOS POSKeyboard OLE Control"),
      hidden
    ]
    dispinterface _DPOSKeyboard {
        properties:
            [id(0x00000001)            
]
            BSTR CheckHealthText;
            [id(0x00000002)            
]
            VARIANT_BOOL Claimed;
            [id(0x00000003)            
]
            VARIANT_BOOL DataEventEnabled;
            [id(0x00000004)            
]
            VARIANT_BOOL DeviceEnabled;
            [id(0x00000005)            
]
            VARIANT_BOOL FreezeEvents;
            [id(0x00000006)            
]
            long ResultCode;
            [id(0x00000007)            
]
            long ResultCodeExtended;
            [id(0x00000008)            
]
            long State;
            [id(0x00000009)            
]
            BSTR ControlObjectDescription;
            [id(0x0000000a)            
]
            long ControlObjectVersion;
            [id(0x0000000b)            
]
            BSTR ServiceObjectDescription;
            [id(0x0000000c)            
]
            long ServiceObjectVersion;
            [id(0x0000000d)            
]
            BSTR DeviceDescription;
            [id(0x0000000e)            
]
            BSTR DeviceName;
            [id(0x0000000f)            
]
            long POSKeyData;
            [id(0x0000001a)            
]
            VARIANT_BOOL AutoDisable;
            [id(0x0000001b)            
]
            long BinaryConversion;
            [id(0x0000001c)            
]
            long DataCount;
            [id(0x0000001d)            
]
            VARIANT_BOOL CapKeyUp;
            [id(0x0000001e)            
]
            long EventTypes;
            [id(0x0000001f)            
]
            long POSKeyEventType;
            [id(0x00000021)            
]
            long CapPowerReporting;
            [id(0x00000022)            
]
            long PowerNotify;
            [id(0x00000023)            
]
            long PowerState;
        methods:
            [id(0x00000010)]
            long Open([in] BSTR DeviceName);
            [id(0x00000011)]
            long Close();
            [id(0x00000012)]
            long Claim([in] long Timeout);
            [id(0x00000013)]
            long Release();
            [id(0x00000014)]
            long CheckHealth([in] long Level);
            [id(0x00000015)]
            long ClearInput();
            [id(0x00000016)]
            long DirectIO(
                            [in] long Command, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000017)]
            void SOData([in] long Status);
            [id(0x00000018)]
            void SODirectIO(
                            [in] long EventNumber, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000019)]
            void SOError(
                            [in] long ResultCode, 
                            [in] long ResultCodeExtended, 
                            [in] long ErrorLocus, 
                            [in, out] long* pErrorResponse);
            [id(0x00000020)]
            long SOProcessID();
            [id(0x00000024)]
            void SOStatusUpdate([in] long Status);
    };

    [
      uuid(9B4E1842-FF65-11CF-AA2E-0020AFA49D5A),
      helpstring("Event interface for OPOS POSKeyboard OLE Control")
    ]
    dispinterface _DPOSKeyboardEvents {
        properties:
        methods:
            [id(0x00000001)]
            void DataEvent([in] long Status);
            [id(0x00000002)]
            void DirectIOEvent(
                            [in] long EventNumber, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000003)]
            void ErrorEvent(
                            [in] long ResultCode, 
                            [in] long ResultCodeExtended, 
                            [in] long ErrorLocus, 
                            [in, out] long* pErrorResponse);
            [id(0x00000004)]
            void StatusUpdateEvent([in] long Status);
    };

    [
      uuid(9B4E1843-FF65-11CF-AA2E-0020AFA49D5A),
      helpstring("OPOS POSKeyboard OLE Control"),
      control
    ]
    coclass POSKeyboard {
        [default] dispinterface _DPOSKeyboard;
        [default, source] dispinterface _DPOSKeyboardEvents;
    };
};

Here is the generate tlb for my .Net assembly:

// Generated .IDL file (by the OLE/COM Object Viewer)
// 
// typelib filename: POSKEYBOARDLib.tlb

[
  uuid(9B4E1840-FF65-11CF-AA2E-0020AFA49D5A),
  version(1.0),
  custom(90883F05-3D28-11D2-8F17-00A0C9A6186D, "POSKEYBOARDLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=5824208931aaf68b")

]
library POSKEYBOARDLib
{
    // TLib :     // TLib : mscorlib.dll : {BED7F4EA-1A96-11D2-8F08-00A0C9A6186D}
    importlib("mscorlib.tlb");
    // TLib : OLE Automation : {00020430-0000-0000-C000-000000000046}
    importlib("STDOLE2.TLB");

    // Forward declare all types defined in this typelib
    dispinterface _DPOSKeyboard;
    dispinterface _DPOSKeyboardEvents;

    [
      uuid(9B4E1841-FF65-11CF-AA2E-0020AFA49D5A),
      version(1.0),
      custom(0F21F359-AB84-41E8-9A78-36D110E6D2F9, "POSKEYBOARDLib._DPOSKeyboard")    

    ]
    dispinterface _DPOSKeyboard {
        properties:
        methods:
            [id(0x00000001), propget]
            BSTR CheckHealthText();
            [id(0x00000001), propput]
            void CheckHealthText([in] BSTR rhs);
            [id(0x00000002), propget]
            VARIANT_BOOL Claimed();
            [id(0x00000002), propput]
            void Claimed([in] VARIANT_BOOL rhs);
            [id(0x00000003), propget]
            VARIANT_BOOL DataEventEnabled();
            [id(0x00000003), propput]
            void DataEventEnabled([in] VARIANT_BOOL rhs);
            [id(0x00000004), propget]
            VARIANT_BOOL DeviceEnabled();
            [id(0x00000004), propput]
            void DeviceEnabled([in] VARIANT_BOOL rhs);
            [id(0x00000005), propget]
            VARIANT_BOOL FreezeEvents();
            [id(0x00000005), propput]
            void FreezeEvents([in] VARIANT_BOOL rhs);
            [id(0x00000006), propget]
            long ResultCode();
            [id(0x00000006), propput]
            void ResultCode([in] long rhs);
            [id(0x00000007), propget]
            long ResultCodeExtended();
            [id(0x00000007), propput]
            void ResultCodeExtended([in] long rhs);
            [id(0x00000008), propget]
            long State();
            [id(0x00000008), propput]
            void State([in] long rhs);
            [id(0x00000009), propget]
            BSTR ControlObjectDescription();
            [id(0x00000009), propput]
            void ControlObjectDescription([in] BSTR rhs);
            [id(0x0000000a), propget]
            long ControlObjectVersion();
            [id(0x0000000a), propput]
            void ControlObjectVersion([in] long rhs);
            [id(0x0000000b), propget]
            BSTR ServiceObjectDescription();
            [id(0x0000000b), propput]
            void ServiceObjectDescription([in] BSTR rhs);
            [id(0x0000000c), propget]
            long ServiceObjectVersion();
            [id(0x0000000c), propput]
            void ServiceObjectVersion([in] long rhs);
            [id(0x0000000d), propget]
            BSTR DeviceDescription();
            [id(0x0000000d), propput]
            void DeviceDescription([in] BSTR rhs);
            [id(0x0000000e), propget]
            BSTR DeviceName();
            [id(0x0000000e), propput]
            void DeviceName([in] BSTR rhs);
            [id(0x0000000f), propget]
            long POSKeyData();
            [id(0x0000000f), propput]
            void POSKeyData([in] long rhs);
            [id(0x00000010)]
            long Open([in] BSTR DeviceName);
            [id(0x00000011)]
            long Close();
            [id(0x00000012)]
            long Claim([in] long Timeout);
            [id(0x00000013)]
            long Release();
            [id(0x00000014)]
            long CheckHealth([in] long Level);
            [id(0x00000015)]
            long ClearInput();
            [id(0x00000016)]
            long DirectIO(
                            [in] long Command, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000017)]
            void SOData([in] long Status);
            [id(0x00000018)]
            void SODirectIO(
                            [in] long EventNumber, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000019)]
            void SOError(
                            [in] long ResultCode, 
                            [in] long ResultCodeExtended, 
                            [in] long ErrorLocus, 
                            [in, out] long* pErrorResponse);
            [id(0x0000001a), propget]
            VARIANT_BOOL AutoDisable();
            [id(0x0000001a), propput]
            void AutoDisable([in] VARIANT_BOOL rhs);
            [id(0x0000001b), propget]
            long BinaryConversion();
            [id(0x0000001b), propput]
            void BinaryConversion([in] long rhs);
            [id(0x0000001c), propget]
            long DataCount();
            [id(0x0000001c), propput]
            void DataCount([in] long rhs);
            [id(0x0000001d), propget]
            VARIANT_BOOL CapKeyUp();
            [id(0x0000001d), propput]
            void CapKeyUp([in] VARIANT_BOOL rhs);
            [id(0x0000001e), propget]
            long EventTypes();
            [id(0x0000001e), propput]
            void EventTypes([in] long rhs);
            [id(0x0000001f), propget]
            long POSKeyEventType();
            [id(0x0000001f), propput]
            void POSKeyEventType([in] long rhs);
            [id(0x00000020)]
            long SOProcessID();
            [id(0x00000021), propget]
            long CapPowerReporting();
            [id(0x00000021), propput]
            void CapPowerReporting([in] long rhs);
            [id(0x00000022), propget]
            long PowerNotify();
            [id(0x00000022), propput]
            void PowerNotify([in] long rhs);
            [id(0x00000023), propget]
            long PowerState();
            [id(0x00000023), propput]
            void PowerState([in] long rhs);
            [id(0x00000024)]
            void SOStatusUpdate([in] long Status);
    };

    [
      uuid(9B4E1842-FF65-11CF-AA2E-0020AFA49D5A),
      version(1.0),
      custom(0F21F359-AB84-41E8-9A78-36D110E6D2F9, "POSKEYBOARDLib._DPOSKeyboardEvents")    

    ]
    dispinterface _DPOSKeyboardEvents {
        properties:
        methods:
            [id(0x00000001)]
            void DataEvent([in] long Status);
            [id(0x00000002)]
            void DirectIOEvent(
                            [in] long EventNumber, 
                            [in, out] long* pData, 
                            [in, out] BSTR* pString);
            [id(0x00000003)]
            void ErrorEvent(
                            [in] long ResultCode, 
                            [in] long ResultCodeExtended, 
                            [in] long ErrorLocus, 
                            [in, out] long* pErrorResponse);
            [id(0x00000004)]
            void StatusUpdateEvent([in] long Status);
    };

    [
      uuid(9B4E1843-FF65-11CF-AA2E-0020AFA49D5A),
      version(1.0),
      custom(0F21F359-AB84-41E8-9A78-36D110E6D2F9, "POSKEYBOARDLib.POSKeyboard")
    ]
    coclass POSKeyboard {
        interface _Object;
        [default] dispinterface _DPOSKeyboard;
        [default, source] dispinterface _DPOSKeyboardEvents;
    };
};

Somehow my properties are listed as methods... Even if I add PreserveSig, it still writes 2 methods instead of making them properties.

What changes should I try to make it identical to the original tlb? Or at least make it work.

UPDATE: Found where I did not have DispIdAttribute on my events interface. Fixed that, but the VB6 app still fails with the same error.

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浪菊怪哟 2024-08-15 13:19:22

COM 接口的名称不能与 重叠IUnknown 方法名称（QueryInterface、AddRef 和 Release ）。

更新

要让您的 C# 类生成 dispinteface（即用于 OLE 自动化绑定的 IDisptach 接口），请使用 ClassInterfaceAttribute：

[ClassInterface(ClassInterfaceType.AutoDispatch)]
class myClass
{
   public string Foo {get;}
   public long Bar();
}

这将生成自动化属性 Foo 和方法 Bar，而不是原始 COM 接口。

You can't have a COM interface with names that overlap the IUnknown method names (QueryInterface, AddRef and Release).

Update

To have your C# class generate a dispinteface (ie. a IDisptach interface for OLE automation binding), decorate your class with ClassInterfaceAttribute:

[ClassInterface(ClassInterfaceType.AutoDispatch)]
class myClass
{
   public string Foo {get;}
   public long Bar();
}

This will generate the automation property Foo and method Bar, as opposed to a raw COM interface.

回复 原文
与之呼应 2024-08-15 13:19:22

您曾经尝试过使用链接中包含的信息：
Visual Basic：使用 TypeLib 信息对象库检查 COM 组件

[编辑]
看看 tlbimp.exe 工具是否有帮助你。

You ever tried to use the information contained in the link:
Visual Basic: Inspect COM Components Using the TypeLib Information Object Library

[EDIT]
See if tlbimp.exe tool can help you.

回复 原文
冷…雨湿花 2024-08-15 13:19:22

好吧，我想通了...

我在目标应用程序上使用 vb6 反编译器进行反编译，并导出为 vb6 项目。

用VS 2008打开，升级为VB .Net。

运行应用程序并看到错误“无法转换为 IOleObject”。

谷歌搜索了一下，发现 System.Windows.Forms.Control 实现了这个接口，所以继承 Control 解决了我的问题。

Well, I figured it out...

I decompiled with a vb6 decompiler on the target app and exported as a vb6 project.

Opened it with VS 2008, upgraded to VB .Net.

Ran the application and saw the error "cannot cast to IOleObject".

Did a google search, found out that System.Windows.Forms.Control implements this interface, so inheriting from Control fixed my issue.

回复 原文
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