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_ATL_FUNC_INFO Structure

Visual Studio 2005

Contains type information used to describe a method or property on a dispinterface.


struct _ATL_FUNC_INFO{
   CALLCONV cc;
   VARTYPE vtReturn;
   SHORT nParams;
   VARTYPE pVarTypes[_ATL_MAX_VARTYPES];
};

Members

cc: The calling convention. When using this structure with the IDispEventSimpleImpl class, this member must be CC_STDCALL. CC_CDECL is the only option supported in Windows CE for the CALLCONV field of the _ATL_FUNC_INFO structure. Any other value is unsupported thus its behavior undefined.

vtReturn: The variant type of the function return value.

nParams: The number of function parameters.

pVarTypes: An array of variant types of the function parameters.

Remarks

Internally, ATL uses this structure to hold information obtained from a type library. You may need to manipulate this structure directly if you provide type information for an event handler used with the IDispEventSimpleImpl class and SINK_ENTRY_INFO macro.

Example

Given a dispinterface method defined in IDL:

void SomeFunction([in] long Number, [in] BSTR String);

you would define an _ATL_FUNC_INFO structure:

_ATL_FUNC_INFO info = {CC_STDCALL, VT_EMPTY, 2, {VT_I4, VT_BSTR} };

Requirements

Header: atlcom.h

Reference

IDispEventSimpleImpl Class
SINK_ENTRY_INFO
VARTYPE

Other Resources

ATL Structures

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