How to send String text from USB_HID P18F4550 to PC

Code C - [expand]
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unsigned char readbuff[64] absolute 0x500;   // Buffers should be in USB RAM, please consult datasheet
unsigned char writebuff[64] absolute 0x540;
//---------------------------------------------------------------------------------------------------
void interrupt()
{
   USB_Interrupt_Proc();                   // USB servicing is done inside the interrupt
}
 
int i = 0;
char key[] = "abcd";
 
void main(void)
{
 //-----------------------------------------------variable area--------------------------------------
 trisb=0; // port as output
 portb=0xff;
 trisc=0;
 ADCON1 |= 0x0F;                         // Configure all ports with analog function as digital
 CMCON  |= 7;
 
 HID_Enable(readbuff,writebuff);      // Enable HID communication
  
 while(1) {
  
    strcpy(writebuff, key);
    while(!(HID_Write(writebuff,64));
 }   
}