ms_union
Controls the network data representation alignment of nonencapsulated unions.
[ms_union]
Remarks
The ms_union C++ attribute has the same functionality as the ms_union MIDL attribute.
Example
The following code shows the placement of ms_union:
// cpp_attr_ref_ms_union.cpp
// compile with: /LD
#include <unknwn.h>
[object, ms_union, uuid("00000000-0000-0000-0000-000000000001")]
__interface IFireTabCtrl {
HRESULT DisplayString([in, string] char * p1);
};
[export, switch_type(short)] union _WILLIE_UNION_TYPE {
[case(24)]
float fMays;
[case(25)]
double dMcCovey;
[default]
int x;
};
[public] typedef _WILLIE_UNION_TYPE WILLIE_UNION_TYPE;
[module(name="ATLFIRELib")];
Requirements
Attribute Context
Applies to |
Nonencapsulated unions |
Repeatable |
No |
Required attributes |
None |
Invalid attributes |
dispinterface |
For more information, see Attribute Contexts.