Program

 please help me change this program written in microbasic to visual basic.
program usart_ay
DIM TXT AS STRING[20]
DIM VALU AS BYTE[3]
DIM I AS BYTE
dim del as char
main:
delay_ms(10)
TRISA = 0
usart_init(9600)
txt = "AT+CMGF=1" + 13 + 10
USART_WRITE_TEXT(TXT)
del = "K"
usart_read_text(txt,del)
TXT = "AT+CPMS=" + 34 + "ME" + 34 + 13 + 10
USART_WRITE_TEXT(TXT)
usart_read_text(txt,del)
TXT = "AT+CNMI=2,1,0,0,0" + 13 + 10
USART_WRITE_TEXT(TXT)
usart_read_text(txt,del)
WAIT:
DO
DO LOOP UNTIL USART_DATA_READY = 1
IF USART_READ = "+" THEN
DO LOOP UNTIL USART_DATA_READY = 1
IF USART_READ = "2" THEN
GOTO IT
END IF
END IF
I = USART_READ
LOOP UNTIL FALSE
IT:
TXT = "AT+CMGL=0" + 13 + 10
USART_WRITE_TEXT(TXT)
DO
DO LOOP UNTIL USART_DATA_READY = 1
IF USART_READ = "#" THEN
DO LOOP UNTIL USART_DATA_READY = 1
IF USART_READ = "S" THEN
usart_write(65)
FOR I = 0 TO 1
DO LOOP UNTIL USART_DATA_READY = 1
NEXT I
VALU[2] = 2*VALU[0] + VALU[1]
USART_WRITE(VALU[2])
GOTO SEE
END IF
END IF
LOOP UNTIL FALSE
SEE:
I = VALU[2] - 144
IF I = 0 T
SELECT CASE I
CASE 0 PORTA = 0
CASE 2 PORTA.0 = 0
CASE 3 PORTA.0 = 1
CASE 4 PORTA.1 = 0
CASE 5 PORTA.1 = 1
CASE 6 PORTA.2 = 0
CASE 7 PORTA.2 = 1
CASE 8 PORTA.3 = 0
CASE 9 PORTA.3 = 1
CASE 12 PORTA = $FF
END SELECT
GOTO WAIT
END.