ISCard::Transaction method
[The Transaction method is available for use in the operating systems specified in the Requirements section. The Smart Card Modules provide similar functionality.]
The Transaction method executes a write and read operation on the smart card command (application protocol data unit) object. The reply string from the smart card for the command string defined in the card that was sent to the smart card will be accessible after this function returns.
Syntax
HRESULT Transaction(
[in, out] LPSCARDCMD *ppCmd
);
Parameters
-
ppCmd [in, out]
-
A pointer to the smart card command object.
Return value
The method returns one of the following possible values.
| Return code | Description |
|---|---|
|
The operation completed successfully. |
|
The ppCmd parameter is not valid. |
|
A bad pointer was passed in ppCmd. |
|
Memory to satisfy the request is unavailable. |
Remarks
In addition to the COM error codes listed above, this interface may return a smart card error code if a smart card function was called to complete the request. For more information, see Smart Card Return Values.
Examples
The following example shows executing a write and read operation on the smart card command object.
HRESULT hr;
// pISCard is a pointer to an instance of ISCard.
// pISCardCmd is a pointer to an instance of ISCardCmd,
// and ISCardCmd::BuildCmd has already been called.
hr = pISCard->Transaction(&pISCardCmd);
if (FAILED(hr))
{
printf("Failed ISCard::Transaction\n");
// Take other error handling action as needed.
}
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows XP [desktop apps only] |
| Minimum supported server |
Windows Server 2003 [desktop apps only] |
| End of client support |
Windows XP |
| End of server support |
Windows Server 2003 |
| Header |
|
| Type library |
|
| DLL |
|
| IID |
IID_ISCard is defined as 1461AAC3-6810-11D0-918F-00AA00C18068 |
See also