类型不匹配错误VbSCript。 [英] Type mismatch Error VbSCript.

问题描述

我有一个c ++ COM dll，我试图通过vbscript访问它。对象创建得很好，但始终显示错误类型不匹配：函数名称

VB脚本代码 -

I have a c++ COM dll which i am trying to access through the vbscript. The Object is created just fine but always shows the error "type mismatch: function name"
VB SCRIPT CODE-

d dim obj1
	set obj1=CreateObject("Begineers.first")
   Dim lngReturnValue 
   Dim a
   a=5
    Dim b
	b=7
    obj1.AddNumbers a, b, lngReturnValue

    Wscript.Echo( "The value of a+b is: " & lngReturnValue)

    Set obj1 = Nothing

c ++ dll中的函数 -

Functions in c++ dll -

STDMETHODIMP Cfirst::AddNumbers(LONG Num1, LONG Num2, LONG* ReturnVal)
{
    // TODO: Add your implementation code here
 *ReturnVal = Num1 + Num2;
    return S_OK;
}

推荐答案

一种可能性......

VB（脚本）可能会抱怨输出/延迟的类型LONG *

你没有显示你的idl，所以我看不出方法是如何声明的

但它可能值得使用结果的变体，例如



[out，retval] VARIANT * retval

One possibility...
VB (script) might be complaining about the type LONG* for an out/retval
You don't show your idl, so I can't see how the method is declared
But it might be worth using a variant for the result, e.g.

[out, retval] VARIANT* retval

这篇关于类型不匹配错误VbSCript。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！