I am writing a script in VB to be used in load runner by using the LR plugin but i am not able to assign the parameter declared/defined in the menu "Vuser->Parameter list"
Details as under

1.Created new parameter appid by using "Vuser->Parameter list" and using new button
2.In the script i use the following syntax :
Dim lr_para_eg As New LrParameterization
lr_para_eg.Data = appid
lr_msg.Send (retval)
lr_para_eg.SaveData (CStr(appidno)), appid

But it prints only null value ?any idea what's wrong?
Has someone tried this before?
Thanks in advance