Define a enum type variable on the Interface (ATL project) ?

iman_kh

hi, i want to define an enum type variable on the Interface , so i have defined an enum within interface and then take a property from this enum, but have encountered with a compile time error !? what is my mistake and what is its solution? interface IXFSReceipt : IDispatch { enum RPtrResolution { RPTR_RESOLUTION_LOW, RPTR_RESOLUTION_MEDIUM, RPTR_RESOLUTION_HIGH, RPTR_RESOLUTION_VERYHIGH }; HRESULT Resolution([out, retval] RPtrResolution* pVal);<<<<<<<< ERROR1 HRESULT Resolution([in] RPtrResolution newVal); }; ERROR1 : error MIDL2025 : syntax error : expecting a type specification

Stephen Hewitt

Don't be afraid to search through the .IDL files that come with the compiler or SDK. On my system I searched all the .IDL files in "C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE" for the word enum. Here's the first example:

typedef enum tagSCRIPTSTATE {
SCRIPTSTATE_UNINITIALIZED = 0,
SCRIPTSTATE_INITIALIZED = 5,
SCRIPTSTATE_STARTED = 1,
SCRIPTSTATE_CONNECTED = 2,
SCRIPTSTATE_DISCONNECTED = 3,
SCRIPTSTATE_CLOSED = 4,

} SCRIPTSTATE ;

/* ....Later.... */

[
object,
uuid(DB01A1E3-A42B-11cf-8F20-00805F2CD064),
pointer_default(unique)
]
interface IActiveScriptSite : IUnknown
{
HRESULT GetLCID(
[out] LCID *plcid
);

HRESULT GetItemInfo(
[in] LPCOLESTR pstrName,
[in] DWORD dwReturnMask,
[out] IUnknown **ppiunkItem,
[out] ITypeInfo **ppti
);

HRESULT GetDocVersionString(
[out] BSTR *pbstrVersion
);

HRESULT OnScriptTerminate(
[in] const VARIANT *pvarResult,
[in] const EXCEPINFO *pexcepinfo
);

HRESULT OnStateChange(
[in] SCRIPTSTATE ssScriptState
);

HRESULT OnScriptError(
[in] IActiveScriptError *pscripterror
);

HRESULT OnEnterScript(void);

HRESULT OnLeaveScript(void);
}

Steve

Vi2

You should use the full name for enum, i.e. "enum RPtrResolution", because of C nature of MIDL compiler. For example,

HRESULT Resolution([out, retval] enum RPtrResolution* pVal);
HRESULT Resolution([in] enum RPtrResolution newVal);

OR you should use a "typedef" statement, suggested by Stephen Hewitt.

typedef enum RPtrResolution
{
...
} RPtrResolution;

With best wishes, Vita