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ITypeInfo.Invoke Method

Invokes a method, or accesses a property of an object, that implements the interface described by the type description.

Namespace:  System.Runtime.InteropServices.ComTypes
Assembly:  mscorlib (in mscorlib.dll)

void Invoke(
	Object pvInstance,
	int memid,
	short wFlags,
	ref DISPPARAMS pDispParams,
	IntPtr pVarResult,
	IntPtr pExcepInfo,
	out int puArgErr


Type: System.Object

A reference to the interface described by this type description.

Type: System.Int32

A value that identifies the interface member.

Type: System.Int16

Flags that describe the context of the invoke call.

Type: System.Runtime.InteropServices.ComTypes.DISPPARAMS

A reference to a structure that contains an array of arguments, an array of DISPIDs for named arguments, and counts of the number of elements in each array.

Type: System.IntPtr

A reference to the location at which the result is to be stored. If wFlags specifies DISPATCH_PROPERTYPUT or DISPATCH_PROPERTYPUTREF, pVarResult is ignored. Set to null if no result is desired.

Type: System.IntPtr

A pointer to an exception information structure, which is filled in only if DISP_E_EXCEPTION is returned.

Type: System.Int32

If Invoke returns DISP_E_TYPEMISMATCH, puArgErr indicates the index within rgvarg of the argument with the incorrect type. If more than one argument returns an error, puArgErr indicates only the first argument with an error. This parameter is passed uninitialized.

The values of the pDispParams parameter can be accessed through the PtrToStructure method.

Valid values for the wFlags parameter are:




The member is accessed as a method. If there is ambiguity, both this flag and the DISPATCH_PROPERTYGET flag can be set.


The member is retrieved as a property or data member.


The member is changed as a property or data member.


The member is changed by using a reference assignment, rather than a value assignment. This value is valid only when the property accepts a reference to an object.

For additional information about ITypeInfo::Invoke, see the MSDN Library.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Windows Phone 8.1, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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