>Lets say I have 3 forms open. Each one will use the toolbar if it the active form. If I minimize all three I want the toolbar to be hidden. How do I get that right
Than you could deal with you main Application object add Properties nShowBarForms and oToolBar, Add metods named ShowToolBar, RemoveToolBar:

in Init oif the application object:
Set nShowBarForms = 0
Set oToolBar = NULL

In all forms where you use this ToolBar put:
oApp.ShowToolBar() && Where oApp is your main applciation object

in destroy event of that forms put:
oApp.RemoveToolBar() && Where oApp is your main applciation object

*** oApp ShowToolBar Method:
IF NOT ISNULL (this.oToolBar)
   this.oToolBar = CREATEOBJECT([ToolBarObject])
ENDIF
this.nShowBarForms = this.nShowBarForms + 1

*** oApp RemoveToolBar Method:
this.nShowBarForms = this.nShowBarForms - 1
IF this.nShowBarForms < 1
   this.nShowBarForms = 0
   this.oToolBar.Destroy()
   this.oToolBar      = NULL
ENDIF

Then in Resoze Event of each form taht uses ToolBar put:

IF this.WindowState = 1
   oApp.RemoveToolBar()
ELSE
   oApp.ShowToolBar()
ENDIF

something like that (not tested)