Движение картинки по нажатию кнопок "влево" и "вправо" - VB

Option Explicit
 
Private Const MERGEPAINT = &HBB0226
Private Const SRCAND = &H8800C6
Private Const SRCCOPY = &HCC0020
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
 
' Variables for positioning the image.
Private OldX As Single
Private OldY As Single
Private CurX As Single
Private CurY As Single
Private PicWid As Single
Private PicHgt As Single
Private Xmax As Single
Private Ymax As Single
Private NewX As Single
Private NewY As Single
Private Dx As Single
Private Dy As Single
Private DistToMove As Single
 
Private Const MOVE_OFFSET = 10
 
' Draw the picture at (CurX, CurY).
Private Sub DrawPicture()
    ' Fix the part of the image that was covered.
    BitBlt picCanvas.hDC, _
        OldX, OldY, PicWid, PicHgt, _
        picHidden.hDC, OldX, OldY, SRCCOPY
    OldX = CurX
    OldY = CurY
 
    ' Paint on the new image.
    BitBlt picCanvas.hDC, _
        CurX, CurY, PicWid, PicHgt, _
        picXMask.hDC, 0, 0, MERGEPAINT
    BitBlt picCanvas.hDC, _
        CurX, CurY, PicWid, PicHgt, _
        picX.hDC, 0, 0, SRCAND
 
    ' Update the display.
    picCanvas.Refresh
End Sub
 
' Save picCanvas's original bitmap bytes,
' initialize values, and draw the initial picture.
Private Sub Form_Load()
    ' Make the form fit the picture.
    Width = (Width - ScaleWidth) + picCanvas.Width
    Height = (Height - ScaleHeight) + picCanvas.Height
 
    PicWid = picX.ScaleWidth
    PicHgt = picX.ScaleHeight
    Xmax = picCanvas.ScaleWidth - PicWid
    Ymax = picCanvas.ScaleHeight - PicHgt
    OldX = 30
    OldY = 30
    CurX = 30
    CurY = 30
 
    DrawPicture
End Sub
 
' Stop dragging.
Private Sub picCanvas_MouseUp(Button As Integer, Shift As Integer, x As Single, y As Single)
Dim dist As Single
 
    ' See where to move the image.
    NewX = x - PicWid / 2
    NewY = y - PicHgt / 2
    If NewX < 0 Then NewX = 0
    If NewX > Xmax Then NewX = Xmax
    If NewY < 0 Then NewY = 0
    If NewY > Ymax Then NewY = Ymax
 
    ' Calculate the moving offsets.
    Dx = NewX - CurX
    Dy = NewY - CurY
    DistToMove = Sqr(Dx * Dx + Dy * Dy)
    Dx = Dx / DistToMove * MOVE_OFFSET
    Dy = Dy / DistToMove * MOVE_OFFSET
 
    ' Enable the move timer.
    tmrMove.Enabled = True
End Sub
 
' Move the image closer to its destination.
Private Sub tmrMove_Timer()
    DistToMove = DistToMove - MOVE_OFFSET
    If DistToMove <= 0 Then
        CurX = NewX
        CurY = NewY
        tmrMove.Enabled = False
    Else
        CurX = CurX + Dx
        CurY = CurY + Dy
    End If
 
    DrawPicture
End Sub