Declaration

Visual C#:

int CheckConnection();

Visual C++:

long CheckConnection();

Visual Basic:

Private Sub CheckConnectionas Integer

Delphi:

function CheckConnection : Integer;

Return Value

    0: Port is not opened.

    1: Device is ready.

    2: Device is sending SMS.

    3: Connection is lost.

    4: Device is busy.

Remarks

Check the connection status.

See Also  Connect, Disconnect