Function without As clause not giving any error.

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Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

Dim a As String = GetMsg("a")

''Other task

End Sub

Private Function GetMsg()
Return "5"
End Function

---------------------------------------

In above code why the compiler not giving any error for GetMsg function.Actually I am passing one parameter to GetMsg function but GetMsg function does not accept any function then why compiler not giving any error?

Posted 17-Dec-14 19:37pm

dinundmn

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Sinisa Hajnal · Accepted Answer · 2014-12-17T20:28:00

This is a "feature" in VB.NET, legacy of VB. By default, option strict is off and it will not warn you about type mismatch. In this case, your GetMsg returns object which is implicitly cast into String.

Go to Project-> Properties -> Compile, find Options strict and set it to on. Then check the Warning configurations below and decide if you want certain types of notifications to be warning, error or ignored.

If this helps please take time to accept the solution. Thank you.