XnView Software

Excuse me, I have wrong understood, what use this function. But now appeared other problem. See the source code and results:
Dim gf As New GflAx.GflAx

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
gf.NewBitmap(300, 200)
gf.MergeAddFile("a ...

I find a error in function Merge (GflAx Light Library 2.70). For example, make the project in VB.NET, create a form:
Public Class Form1
Dim gf As New GflAx.GflAx

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
gf.LoadBitmap("C:\test1.jpg ...

How I load the image?
I have a code of the creation screenshot (VB.NET):
Protected Sub CaptureScreen()
Dim hSDC, hMDC As Integer
Dim hBMP, hBMPOld As Integer
Dim rC As Integer
hSDC = CreateDC("DISPLAY", "", "", "")
hMDC = CreateCompatibleDC(hSDC)

FW = GetDeviceCaps(hSDC, 8)
FH ...