RFID tags writing

Question

Can any one tell me how to write information on RFIID tags

library name is MifareAPI.dll

if any one has used this library to write tag

i m using AIR ID Writer RFIDeas Inc

Prototypes of function currently i'm working

[DllImport("MifareAPI.dll")]
public static extern short MF_StoreKey(uint readerKey, ref Byte[] keyBuffer);

[DllImport("MifareAPI.dll")]
public static extern short MF_WriteCardBlock(uint blockAddress, uint readerKey, uint highLow, ref byte[] userBuffer);

[DllImport("MifareAPI.dll")]
public static extern short MF_WriteCardSec(short readerKey, uint dwKeyAB, uint buffSize,ref byte[] pDataBuff,ref byte[] sectorInformation);

[DllImport("MifareAPI.dll")]
public static extern short WriteCfg();