Opening a Dynamics screen from Visual Studio

Hi can anyone maybe please assist me on the following:

I am creating a VB application where I want to launch a standard Dynamics SL screen an pass a parameter to it.

The code that I found to open a screen is :

Call ApplSetParmValue("[MyScreen]", "CustomerId", "C299")

Call CallApplicWait(0826000) -Only examples

But it gives me this error:  

Can anyone please advise me on this thank you!