mapi32_test.h File Reference

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Functions
static BOOL	HaveDefaultMailClient (void)

Function Documentation

HaveDefaultMailClient()

static BOOL HaveDefaultMailClient ( void  )

static

Definition at line 20 of file mapi32_test.h.

{
    HKEY Key;
    DWORD Type, Size;
    BYTE Buffer[64];
    BOOL HasHKCUKey;
 
    /* We check the default value of both HKCU\Software\Clients\Mail and
     * HKLM\Software\Clients\Mail, if one of them is present there is a default
     * mail client. If neither of these keys is present, we might be running
     * on an old Windows version (W95, NT4) and we assume a default mail client
     * might be available. Only if one of the keys is present, but there is
     * no default value do we assume there is no default client. */
    if (RegOpenKeyExA(HKEY_CURRENT_USER, "SOFTWARE\\Clients\\Mail", 0, KEY_QUERY_VALUE, &Key) == ERROR_SUCCESS)
    {
        Size = sizeof(Buffer);
        /* Any return value besides ERROR_FILE_NOT_FOUND (including success,
           ERROR_MORE_DATA) indicates the value is present */
        if (RegQueryValueExA(Key, NULL, NULL, &Type, Buffer, &Size) != ERROR_FILE_NOT_FOUND)
        {
            RegCloseKey(Key);
            return TRUE;
        }
        RegCloseKey(Key);
        HasHKCUKey = TRUE;
    }
    else
        HasHKCUKey = FALSE;
 
    if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, "SOFTWARE\\Clients\\Mail", 0, KEY_QUERY_VALUE, &Key) == ERROR_SUCCESS)
    {
        Size = sizeof(Buffer);
        if (RegQueryValueExA(Key, NULL, NULL, &Type, Buffer, &Size) != ERROR_FILE_NOT_FOUND)
        {
            RegCloseKey(Key);
            return TRUE;
        }
        RegCloseKey(Key);
        return FALSE;
    }
 
    return ! HasHKCUKey;
}

Referenced by START_TEST().