c++(/clr)非托管类型和托管类型互转

以下代码必须有“Common Language Runtime Support(/clr)” 和“MFC”支持

1. 字符窜之间的转换

// 托管类型到非托管类型
 inline CString ManageToUnManageStr(System::String^ cmStr)
{
    using namespace System::Runtime::InteropServices;
    CString cStr = (char*)(Marshal::StringToHGlobalAnsi(cmStr)).ToPointer();
    return cStr;
}

 // 非托管类型到托管类型
 inline System::String^ UnManageToManageStr(const CString& cStr)
{
    const char* cc = (LPCTSTR)cStr;
    System::String^ cmStr = gcnew System::String(cc);
    return cmStr;
}

2. 对象之间的转换

// _variant_t到Object对象
 inline System::Object^ VarToObject(_variant_t var)
{
    using namespace System::Runtime::InteropServices;
    System::IntPtr^ pvar = gcnew System::IntPtr(&var);
    System::Object^ obj = Marshal::GetObjectForNativeVariant(*pvar);
    return obj;
}

 // Object对象到_variant_t
 inline _variant_t* ObjectToVar(System::Object^ obj)
{
    using namespace System::Runtime::InteropServices;
    _variant_t* vt = new _variant_t();
    System::IntPtr^ pvar = (gcnew System::IntPtr((void*)vt));
    Marshal::GetNativeVariantForObject(obj,*pvar);
    return vt;
}

更多：请参考.net库 System.Runtime.InteropServices 命名空间下的类，特别是 Marshal 类。