SCardUIDlgSelectCardA function (winscard.h)

Article
02/09/2023

The SCardUIDlgSelectCard function displays the smart card Select Card dialog box.

Syntax

LONG SCardUIDlgSelectCardA(
  [in] LPOPENCARDNAMEA_EX unnamedParam1
);

Parameters

[in] unnamedParam1

Pointer to the OPENCARDNAME_EX structure for the Select Card dialog box.

Return value

If the function successfully displays the Select Card dialog box, the return value is SCARD_S_SUCCESS.

If the function fails, it returns an error code. For more information, see Smart Card Return Values.

Remarks

The SCardUIDlgSelectCard function provides a method for connecting to a specific smart card. When called, this function performs a search for appropriate smart cards matching the OPENCARD_SEARCH_CRITERIA member specified by the pDlgStruc parameter. Depending on the dwFlags member of pDlgStruc, this function takes the following actions.

Value	Action
SC_DLG_FORCE_UI	Connects to the card selected by the user from the smart card Select Card dialog box.
SC_DLG_MINIMAL_UI	Selects the smart card if only one smart card meets the criteria, or returns information about the user's selection if more than one smart card meets the criteria.
SC_DLG_NO_UI	Selects the first available card.

This function replaces GetOpenCardName. The GetOpenCardName function is maintained for backward compatibility with version 1.0 of the Microsoft Smart Card Base Components.

Examples

The following example shows how to display the smart card Select Card dialog box.

SCARDCONTEXT     hSC;
OPENCARDNAME_EX  dlgStruct;
WCHAR            szReader[256];
WCHAR            szCard[256];
LONG             lReturn;

// Establish a context.
// It will be assigned to the structure's hSCardContext field.
lReturn = SCardEstablishContext(SCARD_SCOPE_USER,
                                NULL,
                                NULL,
                                &hSC );
if ( SCARD_S_SUCCESS != lReturn )
{
    printf("Failed SCardEstablishContext\n");
    exit(1);
}

// Initialize the structure.
memset(&dlgStruct, 0, sizeof(dlgStruct));
dlgStruct.dwStructSize = sizeof(dlgStruct);
dlgStruct.hSCardContext = hSC;
dlgStruct.dwFlags = SC_DLG_FORCE_UI;
dlgStruct.lpstrRdr = (LPSTR) szReader;
dlgStruct.nMaxRdr = 256;
dlgStruct.lpstrCard = (LPSTR) szCard;
dlgStruct.nMaxCard = 256;
dlgStruct.lpstrTitle = (LPSTR) "My Select Card Title";

// Display the select card dialog box.
lReturn = SCardUIDlgSelectCard(&dlgStruct);
if ( SCARD_S_SUCCESS != lReturn )
    printf("Failed SCardUIDlgSelectCard - %x\n", lReturn );
else
    printf("Reader: %S\nCard: %S\n", szReader, szCard );

// Release the context (by SCardReleaseContext - not shown here).

Note

The winscard.h header defines SCardUIDlgSelectCard as an alias that automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	winscard.h
Library	Scarddlg.lib
DLL	Scarddlg.dll

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