高手进，谁调试过OLEDB中调用数据库连接设置窗口的程序

Question

有人提供了一个函数，但编译时提示很多对象未定义。因为小弟对COM不是很明白，所以请大家帮忙看看还需要引用什么头文件，另外这个函数是否还需要改动
BOOL GetConnectString(TCHAR *lpszConnectString,HWND hWndParent){CComPtr<IDBPromptInitialize> pIDBPromptInitialize=NULL;CComPtr<IDBProperties > pIDBProperties = NULL;CComPtr<IDataInitialize> spDataInit=NULL;CComBSTR bstrConnectString;HRESULT hr;// Create an instance of the Data Links component.hr=CoCreateInstance(CLSID_DataLinks, NULL, CLSCTX_INPROC_SERVER,IID_IDBPromptInitialize, (void **)&pIDBPromptInitialize);if (FAILED(hr))return FALSE;// Prompt the user for the provider and initialization properties.hr=pIDBPromptInitialize->PromptDataSource(NULL, hWndParent,DBPROMPTOPTIONS_PROPERTYSHEET, 0, NULL, NULL, IID_IDBProperties,(IUnknown **)&pIDBProperties);if (FAILED(hr))return FALSE;hr = CoCreateInstance(CLSID_MSDAINITIALIZE, NULL, CLSCTX_INPROC_SERVER, IID_IDataInitialize, (void**)&spDataInit);if (FAILED(hr))return FALSE;hr=spDataInit->GetInitializationString(pIDBProperties,true,&bstrConnectString);if (FAILED(hr))return FALSE;
lstrcpy(lpszConnectString,(char*)_bstr_t(bstrConnectString));return TRUE;}

Answer 1

需要加入下面几个头文件就可以了
#include <oledb.h>
#include <msdasc.h>
#include <comutil.h>

Answer 2

CDataSource source;
if(SUCCEEDED(source.Open()))
{
CComBSTR bsConnection;
source.GetInitializationString(&bsConnection,true);
source.Close();
SetDlgItemText(IDC_DATABASE_CONNECTION,CString(bsConnection));//连接字符串
GetDlgItem(IDC_DATABASE_CONNECTION)->SetFocus();
}