Question

I am confused what will happen, when I disable a timer. Will it finish the process and then disable or will it immediately disable without completing process?

for example

Private Sub MyTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyTimer.Tick 
    MyTimer.Enabled = False
    getMessage()         
    MyTimer.Enabled = True
End Sub

I want to run getMessage from somewhere else, so I need to disable timer during that time to be asured not to override anything and also before timer disable it should complete that function code.

Answer 1

Read this MSDN article about the Timer‘s Enabled property. It states

Calling the Start method is the same as setting Enabled to true. Likewise, calling the Stop method is the same as setting Enabled to false.

So in answer to your question, it will stop the Timer when you disable it.