General API Commands
CLX_OpenReader	Open the reader and setup the Serial Port.
CLX_CloseReader	Closes the reader.
CLX_APIVersion	Get the API version number.
CLX_Enable	Keyboard enables the keyboard and disables the reader.
CLX_Disable	Keyboard disables the keyboard and disables the reader.

General Reader Commands
CLX_GetError	Returns error code for the last failed command.
CLX_ResetReader	Issues a soft reset to the reader.
CLX_SetReaderLed	Sets the LED lights to ON or OFF for the reader.
CLX_GetReaderVersion	Returns the version string from the reader.
CLX_GetReaderStatus	Returns the status of the reader.
CLX_GetCardStatus	Returns the status of the card. that is presently in the reader.
CLX_CardInserted	Determines if a card is inserted in the reader.
CLX_LatchReader	Activates the latch mechanism o supported readers.
CLX_UnLatchReader	Deactivates the latch mechanism on supported readers.

Encryption Commands
CLX_DESEncrypt	Encrypt data using DES.
CLX_DESDecrypt	Decrypt data using DES.
CLX_3DESEncrypt	Encrypt data using triple DES.
CLX_3DESDecrypt	Decrypt data using triple DES.
CLX_AESEncrypt	Encrypt data using AES.
CLX_AESDecrypt	Decrypt data using AES.

Magnetic Strip Commands
CLX_StartMagCard	Activates the magnetic stripe reader. Tracks 1 & 2.
CLX_GetMagData	Read data placed in the device buffer after card is swiped.
CLX_StopMagCard	Stop the mag-strip.

Memory Card Commands
CLX_SetCardType	Selects the card type.
CLX_ReadCard	Reads data from the card.
CLX_WriteCard	Writes data to the card.
CLX_ReadCardToFile	Read the card data a write is directly to a file.
CLX_WriteCardFromFile	Write to the card directly from a file.
CLX_VerifyPin	Sends a PIN or 'password' to a card.
CLX_EraseBinary	Erase data from a card (used for specific types).
CLX_LoadD2Password	Sends an 8 byte password to the D2 card.
CLX_ReadD2Config	Reads the 5 byte D2 card configuration.
CLX_ProgD2Config	Programs the 5 byte D2 card configuration.
CLX_D2MassProgram	Reset the D2 card to all zeros.
CLX_D2MassErase	Reset the D2 card to all ones.
CLX_ReadD2Card	Read from a D2 card (no pass, with pass, with config pass).
CLX_WriteD2Card	Write to a D2 card.
CLX_ReadD2CardPass	Read from a D2 card that is read protected.
CLX_WriteD2CardPass	Write to a D2 card that is write protected.
CLX_ReadD2Card	Read data from a D2 card.
CLX_WriteD2Card	Write data to a D2 card.
CLX_SetD2ReadPass	Set the read password in a D2 card.
CLX_SetD2WritePass	Set the write password in a D2 card.
CLX_SetD2ConfPass	Set the configuration password in a D2 card.
CLX_ResetD2ReadPass	Reset the read password in a D2 card.
CLX_ResetD2WritePass	Reset the write password in a D2 card.
CLX_WriteD2CardFromFile	Write to a D2 card directly from a file.
CLX_WriteD2CardFromFilePass	Write to a D2 card that is write protected directly from a file.
CLX_ReadD2CardToFilePass	Read a read protected D2 card directly to a file.
CLX_LoadB1Password	Load the user password in a B1 card.
CLX_EraseB1Memory	Erase Memory in a B1 card.
CLX_ReadB1Value	Reads the stored value in a B1 card.
CLX_Get1EC	Decrements the stored value in a B1 card.
CLX_VerifyK2Password	Present the password for a K2 card.
CLX_GetK2EC	Returns the erase counter for the K2 card

Microprocessor Commands
CLX_CardOn	Turns microprocessor card on and gets ATR.
CLX_CardOff	Turns microprocessor card off.
CLX_Write7816	Sends a write data ISO 7816 command.
CLX_Read7816	Sends a read data ISO 7816 command.
CLX_Select7816	Selects a file.
CLX_Invalidate7816	Invalidates (deletes) the currently selected file.
CLX_Verify7816	Send a password to verify currently selected file.
CLX_ReadBinary7816	Read data from the currently selected file.
CLX_WriteBinary7816	Write data to the currently selected file.
CLX_UpdateBinary7816	Update data to the currently selected file.
CLX_Rehab7816	Rehabilitates (undeletes) the currently selected file.
CLX_GetChallenge7816	Get Challenge data (44 bytes) from microprocessor card.
CLX_ExternalAuth7816	Send response to challenge data (20 bytes).
CLX_GetResponse7816	Gets data from InternalAuth Command (20 bytes).
CLX_InternalAuth7816	Verifies that a card is valid.
CLX_Sha	Calculates SHA response for ExternalAuth command.
CLX_ShaInternal	Calculates SHA response for InternalAuth command.
CLX_PurseVal	Reads the value of a purse file.
CLX_PurseDep	Deposits value to a purse file.
CLX_PurseWdl	Withdraws value from a purse file.
CLX_PurseInit	Initializes secure purse functions
CLX_GenerateKey	Generates session keys for secure commands.
CLX_SetEncryption	Set the encryption mode for secure commands.
CLX_ReadSecure	Read secure data from the currently selected file.
CLX_WriteSecure	Write secure data to the currently selected file.
CLX_UpdateSecure	Update secure data to the currently selected file.
CLX_SetKey	Manually set a session key for secure commands.
CLX_COExternalAuth	Send response to challenge data (CO card - 8 bytes).
CLX_COGetResponse	Gets data from InternalAuth command (CO card - 8 bytes)
CLX_COInternalAuth	Verifies that a card is valid (for CO card only).

The above commands are from Winplex v1.2.1, released November 2004.