Excel 与其他 Office 产品一样，通过 COM 导出其内容。这可用于 C++、VB、C# 和任何其他具有 COM 互操作性的语言——前提是您在 Windows 中运行并安装了 Excel。 （您无法从普通 C 访问 COM。这是幸运还是不幸取决于您。）
但是，对于非托管语言来说，COM 是一种血腥混乱的痛苦。下面的VB：
Set objExcel = CreateObject("Excel.Application") ' start or use existing Excel
objExcel.Visible = True ' show the window
objExcel.Workbooks.Add ' create an empty workbook
大致翻译成以下C++：
#include <assert.h>
#include <ole2.h>
#include <tchar.h>
int main() {
HRESULT hr;
IDispatch *objExcel, *objWorkbooks;
CLSID clsid;
DISPID id, id2;
DISPPARAMS p;
VARIANT v;
TCHAR *name;
CoInitialize(NULL);
hr = CLSIDFromProgID(_T("Excel.Application"), &clsid);
assert(SUCCEEDED(hr));
hr = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER,
IID_IDispatch, (LPVOID *)&objExcel);
assert(SUCCEEDED(hr));
id2 = DISPID_PROPERTYPUT;
name = _T("Visible");
hr = objExcel->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &id);
assert(SUCCEEDED(hr));
VariantInit(&v);
v.vt = VT_I4;
v.lVal = 1;
p.cArgs = 1;
p.rgvarg = &v;
p.cNamedArgs = 1;
p.rgdispidNamedArgs = &id2;
hr = objExcel->Invoke(id, IID_NULL, LOCALE_SYSTEM_DEFAULT,
DISPATCH_PROPERTYPUT, &p, NULL, NULL, NULL);
assert(SUCCEEDED(hr));
name = _T("Workbooks");
hr = objExcel->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &id);
assert(SUCCEEDED(hr));
p.cArgs = 0;
p.rgvarg = NULL;
p.cNamedArgs = 0;
p.rgdispidNamedArgs = NULL;
hr = objExcel->Invoke(id, IID_NULL, LOCALE_SYSTEM_DEFAULT,
DISPATCH_PROPERTYGET, &p, &v, NULL, NULL);
assert(SUCCEEDED(hr));
objWorkbooks = v.pdispVal;
name = _T("Add");
hr = objWorkbooks->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &id);
assert(SUCCEEDED(hr));
p.cArgs = 0;
p.rgvarg = NULL;
p.cNamedArgs = 0;
p.rgdispidNamedArgs = NULL;
hr = objWorkbooks->Invoke(id, IID_NULL, LOCALE_SYSTEM_DEFAULT,
DISPATCH_PROPERTYGET, &p, NULL, NULL, NULL);
assert(SUCCEEDED(hr));
return 0;
}