Determine datatype of contents in cell: VBA Excel

Function CellType(c)
'   Returns the cell type of the upper left
'   cell in a range
    Application.Volatile
    Set c = c.Range("A1")
    Select Case True
        Case IsEmpty(c): CellType = "Blank"
        Case Application.IsText(c): CellType = "Text"
        Case Application.IsLogical(c): CellType = "Logical"
        Case Application.IsErr(c): CellType = "Error"
        Case IsDate(c): CellType = "Date"
        Case InStr(1, c.Text, ":") 0: CellType = "Time"
        Case IsNumeric(c): CellType = "Value"
    End Select
End Function