<DllImport("kernel32.dll", EntryPoint:="lstrcpynA")> Shared Function lstrcpyn(ByVal lpString As StringBuilder, ByVal lpString2 As String, ByVal iMaxLength As Integer) As IntPtr End Function Dim str1 As New StringBuilder Dim str2 As String str2 = "Windows API" Dim rtvl As IntPtr rtvl = lstrcpyn(str1, str2, 8)