How do you Locate Coordinates of Large Picture Behing Picture Box?

I have a picture box with a extremely large picture behind it.  I use the (picMain.PaintPicture LoadPicture(Pic), x, y) to manuever around the large picture.  How do you determine the x,y coordinates of the large picture?

This is what I'm trying to do:  Inside the large picture box I have 10 small picture boxes that you can move around by clicking on one and then clicking on the location you want to move it to.  To do this I use the Left, Top Coordinates of the picture boxes.  Although, now, I have a large "map" (Much bigger than the large picture box) behind the large picture box that you can move around.  Although, using the left, top properties, when I move to a different position on the main map, the 10 small picture boxes(Units), stay at the same spot on the large picture box instead of staying at their locations on the "map" behind the large picture box.  When I move on the map I want the large picture box to remain in its same position.  The problem with using left, top properties is that when moving on the map it would be possible to move so far that you would not be able to see the small picture boxes any longer(But I'm not sure that with the left,top properties this would be possible).  So I would appreciate any help solving this problem.  Thanks.
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TimCotteeConnect With a Mentor Commented:
minitrucker87: So if I understand correctly you want the small picture boxes to stay in the same position relative to the origin of the "Map" rather than the origin of the Picture box in which they are contained? If this is the case then it should be a relatively simple task as all you need to do is when you move the large picture box, determine the difference between the old origin relative to the map and the new origin relative to the map, add/subtract this from the origins of the smaller picture boxes as appropriate. The following code demonstrates an example of how this may be achieved.

Assumptions, large picture box is picLarge, small ones are control array picSmall(0) .. (9)

Private Sub MoveLarge(ByVal dX As Integer, ByVal dY As Integer)
  For intPicture = 0 To 9
    picSmall(intPicture).Left = picSmall(intPicture).Left - dX
    picSmall(intPicture).Top = picSmall(intPicture).Top - dY
  picLarge.Move picLarge.Left + dX, picLarge.Top + dY
End Sub

This will shift the position of the smaller picture boxes relative to the origin of the larger one as it is similarly moved relative to the origin of the "map". It may not directly apply to your scenario but the principle should be.
This will probably be of little help- but maybe give you some ideas-
set picmain.paintpicture.visible = false
set picmain.stretch = false before calling the load
then call the load
take the the height and width of picmain.paintpicture into vars-
create a conversion routine keeping original ratios but creating new dimensions of the picture that match your small boxes-
set picmain.height and width = to return of conversion-
set picmain.stretch = true
set picmain.visible = true

hope it helps...
Valliappan ANSenior Tech ConsultantCommented:
Do  you use vertical / horizontal scroll bars. If so, you could set the top/left properties of the other picture boxes, in the scroll bar click event(s), according to the large picture box's position.
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Also look at the picclip control. (in MS Common COntrols)
It's fast, and very flexible.
Don't touch the picclip control.  Just follow tim's solution.
I'm curious - what do you have against the picclip control ??

I've used it in several graphics intensive apps, and it provides a very useful set of tools at a high-level...

Not arguing, just wondering ?
As long as we are talking tools- LeadTools offers a very extensive set for pciture handling/manipulation.
Hi minitrucker87@devx,
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