SQLHANDLE-Parameters：函数不带x个参数（但实际上有）

Question

I implemented some function in c++ to handle sql-queries and stuff. Because I am doing this in different functions using the same handles, I am giving the handles as parameters (actually I want to inout references to the handles - but I am new to c++ and still having trouble understanding the concepts behind pointers and so).

Because the Error-Message is saying, that there is no function with x parameters, but there actually is one (there is a forward declaration as well), I think, that the definition and the use I am trying to make of it are somehow wrong.

Here is the forward declaration:

static HRESULT 
_OpenDatabase(
    LPCWSTR connectionString, 
    SQLHANDLE hdlStmt, 
    SQLHANDLE hdlEnv, 
    SQLHANDLE hdlConn
);

And the call (getting the connection string as input: __in LPCWSTR ConnectString)

SQLHANDLE hdlStmt = INVALID_HANDLE_VALUE;
SQLHANDLE hdlEnv = INVALID_HANDLE_VALUE;
SQLHANDLE hdlConn = INVALID_HANDLE_VALUE;
    hr = _OpenDatabase(
        ConnectString,
        &hdlStmt, // this might be wrong?
        &hdlEnv, // and this
        &hdlConn // and this
    );

What am I doing wrong?

Answer 1

You're putting & in front of the arguments. Why? You have 3 SQLHANDLE , you need 3 SQLHANDLE .