excel - Change region format to another language with VBA

Question

I need to change the region format to "French (Canada)" in order for datevalue to accept french months (eg. 05 Mars, 12 Avril, etc) and then revert it back to "English (Canada)" within the VBA code.

I hope it's not as complex and that there is a write property that can modify this setting with VBA.

So far, I've found Application.International(xlCountrySetting) but it is only a read property.

This is the setting in question I wish to change:

Thanks

Answer 1

As pointed out in the comments, you can do this with a couple simple Windows API calls. Instead of assuming that the machine is currently set to "English (Canada)", I'd suggest testing the current setting with GetUserDefaultLCID, and then setting it back to that when you're done.

#If VBA7 Then
    Private Declare PtrSafe Function SetThreadLocale Lib "kernel32" _
        (ByVal Locale As Long) As Boolean
    Private Declare PtrSafe Function GetUserDefaultLCID Lib "kernel32" () As Long
    Private Declare PtrSafe Function LocaleNameToLCID Lib "kernel32" _
        (ByVal lpName As LongPtr, dwFlags As Long) As Long
#Else
    Private Declare Function SetThreadLocale Lib "kernel32" (ByVal Locale As Long) As Boolean
    Private Declare Function GetUserDefaultLCID Lib "kernel32" () As Long
    Private Declare Function LocaleNameToLCID Lib "kernel32" _
       (ByVal lpName As LongPtr, dwFlags As Long) As Long
#End If

Private Sub Test()
    'Get the locale identifier for French (Canada)
    Dim frCa As Long
    frCa = LocaleNameToLCID(StrPtr("fr-CA"), 0)
    'Make sure there function succeeded.
    If result = 0 Then
        'Cache the current locale
        Dim userLocale As Long
        userLocale = GetUserDefaultLCID
        'Switch to French (Canada)
        If SetThreadLocale(frCa) Then
            'en fran?ais
            '...
            'switch back
            SetThreadLocale userLocale
        End If
    End If
End Sub

Documentation links for the relevant functions are below:

• SetThreadLocale
• GetUserDefaultLCID
• LocaleNameToLCID