Variables and constants across multiple vba macros in same module & workbook - excel

Question

After a lot of small sub() writing in the same Excel workbook, I realised that I often used same part code, variables and constants. Thus I decided to write funcions() for the code, and declare variables & constant/static as Public outside functions and sub. I am very new to vba declarations and this is not so easy. Let me give you one summary of what i want to achieve. I have writen all funcions and sub in one module under the module directory of the workbook.
Option Explicit
Public ToDate As String ' variable I use in many sub and functions
Public MyPath As String ' variable I use in many sub and functions
Public NameOfWorker As Variant ' constant I use in many sub and functions
Public Salary As Double ' constant I use in many sub and functions
NameOfWorker = Cells(14, 19) ' !!! PB : 14 is highlighed with error : incorrect instruction outside a procedure
Salary = Cells(20, 7).Value '!!! same as above
How and where shall I declare such constants/statics ? Shall I write a "special" procedure to declare all these variables and constants ? I tried many way to declare them with no success.
Public Static NameOfWorker = Cells(14, 19) As String ' not working
''''''
Public Static nameOfWorker As String
NameOfWorker = Cells(14, 19) ' not working
''' etc etc
Thank you for help.
EDIT : after more reading, I found one solution this way:
Public Const MY_PATH = "Y:\path\to\directory\"
Public Const WORKERNAME = "14, 19"
Not so bad :-)

Answer 1

You could create a new module called something like DataHelper which looks like this:
Private NameOfWorker As String
Private AgeOfWorker As Long
Private SetupComplete As Boolean
Public Function GetNameOfWorker()
If NameOfWorker = "" Then
NameOfWorker = Sheets("SomeSheet").Cells(14, 19)
End If
GetNameOfWorker = NameOfWorker
End Function
Public Function GetAgeOfWorker()
...
End Function
Now in any other code you can retreive the value:
Sub SomeMethod()
Cells(1, 1).Value = DataHelper.GetNameOfWorker()
End Sub
...and you never have to worry if it's been set.

Answer 2

Good question!
I would Dim the globals above all the subs in the module, but initialize the globals at a convenient spot within some sub. For example:
Public NameOfWorker As String
Public AgeOfWorker As Long
Public SetupComplete As Boolean
Sub MAIN()
If SetupComplete Then
Else
NameOfWorker = Sheets("Sheet1").Range("B9")
AgeOfWorker = Sheets("Sheet1").Range("B10")
SetupComplete = True
MsgBox "Global variable set up complete!"
End If
End Sub