How to Desable the Textbox

Question

Hi

 

I have a windows form in that form there are 14 fields

 

date                     date

customer id         textbox

customer Name   textbox

Invoice No            textbox

payment Mode      checkbox(Cash,cheque,online)

cheque no            textbox

bank name            textbox

branch                  textbox

clearance date      date

cheque status      combobox

transaction no      textbox

total amount         textbox

Paid Amount         textbox

Remaining Amount textbox

 

when I select checkbox(Cash) need to disable  this filed

 

cheque no            textbox

bank name            textbox

branch                  textbox

clearance date      date

cheque status      combobox

transaction no      textbox

 

 

and when I select checkbox(Online) need to disable

 

cheque no            textbox

clearance date      date

cheque status      combobox

 

and when I select checkbox(cheque)

 

all the field will be appear

how I can do this...please help me