Put the following procedure in any standard module in your database:
Public Sub ConvertToCaps(KeyAscii As Integer)
' Converts text typed into control to upper case
Dim strCharacter As String
' Convert ANSI value to character string.
strCharacter = Chr(KeyAscii)
' Convert character to upper case, then to ANSI value.
KeyAscii = Asc(UCase(strCharacter))
End Sub
and in the KeyPress event procedure of any control call it with:
ConvertToCaps KeyAscii