Marshal.GetComSlotForMethodInfo(MemberInfo) Method
Definition
Important
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Retrieves the virtual function table (v-table or VTBL) slot for a specified MemberInfo type when that type is exposed to COM.
public:
static int GetComSlotForMethodInfo(System::Reflection::MemberInfo ^ m);public static int GetComSlotForMethodInfo (System.Reflection.MemberInfo m);[System.Security.SecurityCritical]
public static int GetComSlotForMethodInfo (System.Reflection.MemberInfo m);static member GetComSlotForMethodInfo : System.Reflection.MemberInfo -> int[<System.Security.SecurityCritical>]
static member GetComSlotForMethodInfo : System.Reflection.MemberInfo -> intPublic Shared Function GetComSlotForMethodInfo (m As MemberInfo) As IntegerParameters
An object that represents an interface method.
Returns
The VTBL slot m identifier when it is exposed to COM.
- Attributes
Exceptions
The m parameter is null.
Remarks
The zero-based slot number returned by this method accounts for three IUnknown and possibly four IDispatch methods, making the value of the first available slot either 3 or 7. GetComSlotForMethodInfo provides the opposite functionality of Marshal.GetMethodInfoForComSlot.
You can use this method to retrieve slot numbers for members of interfaces that are not visible from COM and for members of private interfaces. The slot numbers returned correspond to the v-table numbers that would be reserved if the type was exposed to COM. COM-invisible members actually occupy a slot in an exposed v-table, even though the COM client cannot use the slot. You cannot use GetComSlotForMethodInfo on a class interface by passing MemberInfo from a class. For additional information, see Introducing the class interface.
