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# lrc_DispMethod

IDispatch Interface Calls

Invokes a method of an interface using the IDispatch:Invoke method.

    VARIANT lrc_DispMethod( IDispatch * pDispatch, char *idName, unsigned long locale, ...);

*pDispatch | A pointer to the IDispatch interface.
*idName | A pointer to the name of the method to invoke.
locale | The language locale.

Additional Arguments

Args | A list of the required arguments of the method (the unnamed arguments of the DispParams structure in the original Microsoft definition).
OPTIONAL_ARGS | An optional flag signaling that the next arguments will be a series of pairs of optional arguments, with each pair giving the name and the value of the argument (the named arguments of the DispParams structure in the original Microsoft definition).
LAST_ARG | A flag signaling that the preceding argument was the last argument.
__CheckResult | This flag is generated by VuGen to indicate if the call was successful when the script was generated and HRESULT should be checked. Values: CHECK_HRES or DONT_CHECK_HRES.

The lrc_DispMethodfunction invokes a method of an interface using the IDispatch:Invoke method. The lrc_DispMethod call sets wflags to DISPATCH_METHOD.

Calls to GetIDsOfNames are hidden inside the lrc_Dispcalls.The lrc_DispMethod returns the return value of the invoked function.

IDispatch is a "meta-interface" that exposes all of the other interfaces and methods of a COM object.

## Return Values

lrc Return Values

## Parameterization

You cannot use standard parameterization for any arguments in this function.

## Example

This example shows how to use lrc_Dispmethod with optional arguments.

    GUID riid = IID_IDispatch;
    lrc_IOptional_QueryInterface(IOptional_0, &riid,(void**)&IOptional_0, CHECK_HRES);
    VARIANT P1 = lrc_variant_short("47");
    VARIANT P2 = lrc_variant_short("37");
    VARIANT P3 = lrc_variant_date("3/19/1901");
    VARIANT var3 = lrc_variant_scode("4");
    lrc_DispMethod((IDispatch*)IOptional_0, "in_out_optional_args", /*locale*/1024, &P1, &P2, OPTIONAL_ARGS, "#3", &P3, "var3", &var3, LAST_ARG, CHECK_HRES);

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