请版主帮我看看程序如何修改
一个编码器的数据采集程序,用VC调用VB编写的DLL出错。错误提示如下:
Test.cpp
C:\Documents and Settings\Owner.LENOVO-52CEDA01\桌面\Test.cpp(23) : error C2664: 'readGAM60Value' : cannot convert parameter 1 from 'char ' to 'unsigned short ** '
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
Error executing cl.exe.
VB编写的DLL见附件。
程序代码:
#include <stdio.h>
// This is the path for your DLL.
// Make sure that you specify the exact path.
#import "d:\project1.dll"no_namespace
void main()
{
BSTR bstrDesc;
try
{
CoInitialize(NULL);
// Declare the Interface Pointer for your Visual Basic object. here,
// _Class1Ptr is the Smart pointer wrapper class representing the
// default interface of the Visual Basic object.
_Class1Ptr ptr;
// Create an instance of your Visual Basic object, here
// __uuidof(Class1) gets the CLSID of your Visual Basic object.
ptr.CreateInstance(__uuidof(Class1));
double jiaodu =ptr->readGAM60Value("2330300D");
}
catch(_com_error &e)
{ bstrDesc = e.Description(); }
CoUninitialize();
}
[ 本帖最后由 li343 于 2009-9-28 14:25 编辑 ]
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