Need help working with 2D array to modify a image

Hi:

I am getting crazy trying to:

-Read from a richtextbox a text that contains the values of color depth of the pixels of a image.
-The text is secuencial a11,a12,a13,a21,a22....
-The values are separated by a blank space
-take those values and put them in a cuadrant of the whole picture matrix
-change the picture

This is what I´m trying:

I wrote the matrix into the text:
For x = X_ini To X_ini + 49 'filas
For y = y_ini To y_ini + 49 'columnas
s = s & Data(x, y) & " "
count = count + 1
Next y
txtNote.Text = txtNote.Text & s
Next x
Text6.Text = count


I take back the 50x50 matrix

Const NumRows = 50
Const NumCols = 50

Dim aux() As String
Dim sTmp() As String
Dim i, x, j As Integer

Dim iArr(NumRows, NumCols) As Long
Dim strText As String


Dim xin As Long
Dim yin As Long



Text4.Text = vimage.stx
Text5.Text = vimage.sty
strText = txtNote.Text
aux() = Split(strText, vbCrLf)
xin = X_ini
yin = y_ini

For i = 0 To UBound(aux())
sTmp = Split(aux(i))
For x = 0 To NumCols
iArr(i, x) = CLng(sTmp(x))
Next x
Next i


i = 0
j = 0
For a = X_ini To X_ini + NumRows - 1
For b = y_ini To y_ini + NumCols - 1
rcode = setpixelcolor(vimage, a, b, iArr(i, j))
j = j + 1
Next b
j = 0
i = i + 1
Next a

MainWnd.form_paint 'Redraw image
MainWnd.Show
' Reset the scroll ranges for the new image

' Handle any errors
If rcode <> NO_ERROR Then
MainWnd.error_handler rcode, ""
End If


I dont get this work,I got zeros in places that doesn´t supposed to be.I am using victor image processing dll.

What am I doing wrong? does anybody a way to do it?

NEED HELP!!!

THANKXXX!!

I am so confused ...