Copying vs assigning Picture/StdPicture object *[RESOLVED]*

[Aldragor]

I load a picture in a usercontrol.picture Then I try to copy it in a StdPicture object named picOriginal. I then modify my usercontrol.picture as I want. If I want to get back to my original picture I like to overwrite my usercontrol.picture with the picOriginal object. But it seem that the two objects are modified simultaniously.

here is a code exemple

Dim picOriginal As New StdPicture
 
UserControl.Picture = LoadPicture("imgage1.bmp")
Set picOriginal = UserControl.Picture
Set UserControl.Picture = Transform(UserControl.Picture, New_Color, m_TransparentColor)
 
'Here I see good result
'Now I want to set it back to Original
 
Set UserControl.Picture = picOriginal
'Try refresh, repaint...
'No result

[techgnome]

That's because, instead of copying the picture to the new picture control, VB simply used the same memory space for both pics. In order to get two separate versions of the image (in two separate memory spaces), the image needs to be copied to a new location. Try looking at the BitBlt API I think that will do what you need it to do. And possibly the CopyMem (CopyMemory, I'm not sure of the exact name), but I think BitBlt will suffice.

[Aldragor]

Thanx

I will do that, but I'm surprise that is no way to do it in VB!

[techgnome]

It's an object thing..... conserves memory by using pointers instead of physically copying the memory..... can be extremely annoying. Esp, when you mean to copy it to a new location.