Making an ImageView visible / invisible

[Plons]

Greetings !
I am very new to B4A, and did quite a bit of searching to solve this problem:

#Region  Project Attributes 
   #ApplicationLabel: B4A voor Martijn
   #VersionCode: 1
   #VersionName: the basics
   'SupportedOrientations possible values: unspecified, landscape or portrait.
   #SupportedOrientations: unspecified
   #CanInstallToExternalStorage: False
#End Region

#Region  Activity Attributes 
   #FullScreen: False
   #IncludeTitle: True
#End Region

Sub Process_Globals
   'These global variables will be declared once when the application starts.
   'These variables can be accessed from all modules.

End Sub

Sub Globals
   'These global variables will be redeclared each time the activity is created.
   'These variables can only be accessed from this module.

   Dim Aplomb_logo As ImageView
   Dim btnPreSelect1 As Button
   Dim btnPreSelect2 As Button
   Dim btnPreSelect3 As Button
   Dim sbBlueSlider As SeekBar
   Dim sbGreenSlider As SeekBar
   Dim sbRedSlider As SeekBar
   Dim sbWhiteSlider As SeekBar
   Dim btnAplomb As Button
   Dim imgAnnie As ImageView
End Sub

Sub Activity_Create(FirstTime As Boolean)
   'Do not forget to load the layout file created with the visual designer. For example:
   Activity.LoadLayout("Martijn2")

End Sub

'Removed all not-used subs in this forum post for clarity

Sub btnAplomb_Down
   imgAnnie.Visible = 1
End Sub
Sub btnAplomb_Up
   imgAnnie.Visible = 0
End Sub

It compiles OK, but when touching the btnAplomb on the tablet, the program stops and shows the error in the IDE (program runs on tablet, connected using B4A Bridge)
I am overlooking something obviously, but cannot find it.

Your help is appreciated

Nard
a.k.a. Plons

 

[thedesolatesoul]

I think you should use:

Sub btnAplomb_Down
    imgAnnie.Visible = True
End Sub
Sub btnAplomb_Up
    imgAnnie.Visible = False
End Sub

 

[Plons]

Thank you very much ! That does it.

Nard