1st mouse click does not fire

[Microchip1222]

I have been working with VB for about five years. I am not a newbie, but I am not an expert either.

I have a simple program. It has a "Start" and an "Exit" button. When the "START" button is hit, I change the text on the exit button to read "STOP PROCESSING". Then I go into my processing loop.

When the "STOP PROCESSING" button is clicked the first time, the program simply ignores it. When I click it the SECOND time, it gets control. I know this because I put a breakpoint in at the start of the subroutine.

What could I possibly be doing to quash the firing the first time? Any ideas? Has anyone ever experience this kind of thing?

Thanks in advance
Dave

[jmcilhinney]

If you're setting the Button Text to "Stop Processing" then presumably you are doing some processing. If you don't do that processing, does it still behave the same way?

[vbfbryce]

Can you show us what "processing" you are doing?

[OhGreen]

Could you post the code for the start button .click event?

A quick something to try, when you start the loop include a boolean value such as:

Dim loopstarted as boolean = false
 
Private Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click
 
IF loopstarted = False then
loopstarted = True
'Start loop here including something like "Do until loopstarted = false"
Else
loopstarted = False
End IF
 
End Sub