hi guys sorry for multiply questions i don't always ask untill i try and have no solution

how to add an encryption key between form1 and stub ?
i tried this but didn't work
i'm using rc4 encryption

dim random as string = textbox1.text
rc4(filein, random)

in the stub

dim random as string
rc4(filein, random)

it gives me this error :
Name: problemstubencryption.jpg Views: 340 Size: 13.2 KB